diff --git a/install.sh b/install.sh
index 177dff1..1ce30a3 100755
--- a/install.sh
+++ b/install.sh
@@ -1,43 +1,91 @@
 #!/usr/bin/env bash
 # NVIDIA installer: beside the proxy release's d4r/ or inside the ASI's d4r/.
+# Installs NVIDIA's DLLs and then builds the native engine's models from them on this machine.
 set -euo pipefail
 DLSS_URL=https://raw.githubusercontent.com/NVIDIA/DLSS/a291cc7d2cc642a51566f3dfd5376f635cd1b284/lib/Windows_x86_64/rel/nvngx_dlss.dll
 DLSS_SHA256=be6e434a94ca32499515eb62ca0e6c274526055d568d0426e4c652dcdfb6ee6e
+DLSSD_URL=https://raw.githubusercontent.com/NVIDIA/DLSS/374959484e79a640feaba44c93ac8cfb0a03f5b5/lib/Windows_x86_64/rel/nvngx_dlssd.dll
+DLSSD_SHA256=4bc7ea5fcb2f32cf86bc2cb072e8d2860914a0be511cbdcb2fc206c1d9d83b80
 DRIVER_URL=https://us.download.nvidia.com/Windows/596.36/596.36-desktop-win10-win11-64bit-international-dch-whql.exe
 DRIVER_SHA256=4a1793d2bc7792f43270fe8286ec381ae24409fe29049dbe1eb8530ed89e19cf
 NGX_SHA256=0e3423b3b7afa1019c7ecac053a8408df8e5d9d9d904434705c6aaeacec02fef
 
 fail() { printf 'install.sh: %s\n' "$*" >&2; exit 1; }
-if [[ ${1:-} == --help || ${1:-} == -h ]]; then
-  printf '%s\n' 'Usage: bash install.sh [extracted-release-directory]' \
+usage() {
+  printf '%s\n' 'Usage: bash install.sh [--no-engine | --engine-only] [--rebuild-engine] [extracted-release-directory]' \
     'Default: the directory containing this script, regardless of your working directory.' \
-    'Downloads official NVIDIA DLSS 310.7.0 and NGX from driver 596.36 (~915 MiB).' \
-    'Requires Bash, curl, sha256sum, and 7zz, 7z or 7za. No sudo needed.' \
-    'Existing matching DLLs are kept; differing DLLs are backed up. NVIDIA license terms apply.'
-  exit 0
-fi
-[[ $# -le 1 ]] || fail 'Usage: bash install.sh [extracted-release-directory]'
+    '1. Downloads official NVIDIA DLSS 310.7.0 (Super Resolution), DLSS Ray Reconstruction 310.9.1 and NGX from' \
+    '   driver 596.36 (~1 GiB in all). Existing matching DLLs are kept; differing DLLs are backed up.' \
+    '2. Builds the native engine'"'"'s models ([Engine] in d4r/d4r.ini) from those DLLs into d4r/engine:' \
+    '   Ray Reconstruction D, E and F from nvngx_dlssd.dll; Super Resolution K, M and L (and their LDR variants)' \
+    '   by rendering one test frame per model through d4r under GE-Proton (about a minute each).' \
+    '   --no-engine skips this, --engine-only does only this, --rebuild-engine rebuilds models already built.' \
+    'Requires Bash, curl, sha256sum, 7zz/7z/7za, python3 with numpy, and GE-Proton 11 in Steam (or' \
+    'D4R_PROTON=/path/to/GE-Proton11-3). No sudo needed. NVIDIA license terms apply.'
+}
+DO_DLLS=1 DO_ENGINE=1 REBUILD=0
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    -h|--help) usage; exit 0 ;;
+    --no-engine) DO_ENGINE=0; shift ;;
+    --engine-only) DO_DLLS=0; shift ;;
+    --rebuild-engine) REBUILD=1; shift ;;
+    -*) usage >&2; exit 2 ;;
+    *) break ;;
+  esac
+done
+[[ $# -le 1 ]] || { usage >&2; exit 2; }
 ROOT=$(cd -- "${1:-$(dirname -- "${BASH_SOURCE[0]}")}" && pwd)
 RUNTIME="$ROOT/d4r"
 [[ ! -f "$ROOT/d4r.ini" ]] || RUNTIME="$ROOT"
 [[ -f "$RUNTIME/nvngx.dll" && -f "$RUNTIME/d4r.ini" ]] || fail "Extract the release ZIP first; no d4r runtime found in $ROOT"
 command -v sha256sum >/dev/null || fail 'Missing sha256sum (install coreutils).'
 valid() { [[ -f "$1" ]] && [[ $(sha256sum -- "$1" | cut -d' ' -f1) == "$2" ]]; }
-need_dlss=1; need_ngx=1
-valid "$RUNTIME/nvngx_dlss.dll" "$DLSS_SHA256" && need_dlss=0
-valid "$RUNTIME/ngx/_nvngx.dll" "$NGX_SHA256" && need_ngx=0
-if (( need_dlss == 0 && need_ngx == 0 )); then
-  echo 'NVIDIA DLLs are already installed and verified.'
-  exit 0
-fi
-command -v curl >/dev/null || fail 'Missing curl. Install it and run this script again.'
-if (( need_ngx )); then
+
+install_dlls() {
+  local need_dlss=1 need_dlssd=1 need_ngx=1 tool
+  valid "$RUNTIME/nvngx_dlss.dll" "$DLSS_SHA256" && need_dlss=0
+  valid "$RUNTIME/nvngx_dlssd.dll" "$DLSSD_SHA256" && need_dlssd=0
+  valid "$RUNTIME/ngx/_nvngx.dll" "$NGX_SHA256" && need_ngx=0
+  if (( need_dlss == 0 && need_dlssd == 0 && need_ngx == 0 )); then
+    echo 'NVIDIA DLLs are already installed and verified.'
+    return
+  fi
+  command -v curl >/dev/null || fail 'Missing curl. Install it and run this script again.'
   SEVENZIP=''
-  for tool in 7zz 7z 7za; do
-    if command -v "$tool" >/dev/null; then SEVENZIP=$tool; break; fi
-  done
-  [[ -n "$SEVENZIP" ]] || fail 'Missing 7-Zip. Install 7zip (or p7zip) and run this script again.'
-fi
+  if (( need_ngx )); then
+    for tool in 7zz 7z 7za; do
+      if command -v "$tool" >/dev/null; then SEVENZIP=$tool; break; fi
+    done
+    [[ -n "$SEVENZIP" ]] || fail 'Missing 7-Zip. Install 7zip (or p7zip) and run this script again.'
+  fi
+  echo 'Downloading NVIDIA files under NVIDIA license terms:'
+  echo 'DLSS: https://github.com/NVIDIA/DLSS/blob/v310.9.1/LICENSE.txt'
+  echo 'Driver: https://www.nvidia.com/en-us/drivers/nvidia-license/'
+  if (( need_dlss )); then
+    echo 'Downloading DLSS 310.7.0...'
+    download "$DLSS_URL" "$TMP/nvngx_dlss.dll"
+    verify "$TMP/nvngx_dlss.dll" "$DLSS_SHA256"
+  fi
+  if (( need_dlssd )); then
+    echo 'Downloading DLSS Ray Reconstruction 310.9.1...'
+    download "$DLSSD_URL" "$TMP/nvngx_dlssd.dll"
+    verify "$TMP/nvngx_dlssd.dll" "$DLSSD_SHA256"
+  fi
+  if (( need_ngx )); then
+    echo 'Downloading NVIDIA driver 596.36 (~915 MiB); extracting NGX without running the installer...'
+    download "$DRIVER_URL" "$TMP/driver.exe"
+    verify "$TMP/driver.exe" "$DRIVER_SHA256"
+    "$SEVENZIP" e -y -bso0 -bsp0 "-o$TMP/ngx" "$TMP/driver.exe" 'Display.Driver/_nvngx.dll' || fail 'Could not extract NGX; no DLLs installed.'
+    verify "$TMP/ngx/_nvngx.dll" "$NGX_SHA256"
+  fi
+  # Verify all downloads before modifying any destination.
+  (( need_dlss == 0 )) || place "$TMP/nvngx_dlss.dll" "$RUNTIME/nvngx_dlss.dll"
+  (( need_dlssd == 0 )) || place "$TMP/nvngx_dlssd.dll" "$RUNTIME/nvngx_dlssd.dll"
+  (( need_ngx == 0 )) || place "$TMP/ngx/_nvngx.dll" "$RUNTIME/ngx/_nvngx.dll"
+  echo 'NVIDIA DLLs installed and verified.'
+}
+
 TMP=$(mktemp -d)
 STAGED=''
 trap '[[ -z "$STAGED" ]] || rm -f -- "$STAGED"; rm -rf -- "$TMP"' EXIT
@@ -48,23 +96,7 @@ download() {
     --proto '=https' --proto-redir '=https' --output "$2" "$1" || fail "Download failed: $1. Run the installer again to retry."
 }
 verify() { valid "$1" "$2" || fail "SHA-256 mismatch for $1; no DLLs installed."; }
-echo 'Downloading NVIDIA files under NVIDIA license terms:'
-echo 'DLSS: https://github.com/NVIDIA/DLSS/blob/v310.7.0/LICENSE.txt'
-echo 'Driver: https://www.nvidia.com/en-us/drivers/nvidia-license/'
-if (( need_dlss )); then
-  echo 'Downloading DLSS 310.7.0...'
-  download "$DLSS_URL" "$TMP/nvngx_dlss.dll"
-  verify "$TMP/nvngx_dlss.dll" "$DLSS_SHA256"
-fi
-if (( need_ngx )); then
-  echo 'Downloading NVIDIA driver 596.36 (~915 MiB); extracting NGX without running the installer...'
-  download "$DRIVER_URL" "$TMP/driver.exe"
-  verify "$TMP/driver.exe" "$DRIVER_SHA256"
-  "$SEVENZIP" e -y -bso0 -bsp0 "-o$TMP/ngx" "$TMP/driver.exe" 'Display.Driver/_nvngx.dll' || fail 'Could not extract NGX; no DLLs installed.'
-  verify "$TMP/ngx/_nvngx.dll" "$NGX_SHA256"
-fi
-# Verify all downloads before modifying either destination. Stage on the destination
-# filesystem for atomic replacement and retain a unique backup of a differing file.
+# Stage on the destination filesystem for atomic replacement and retain a unique backup of a differing file.
 place() {
   local src=$1 dst=$2 backup
   mkdir -p -- "$(dirname -- "$dst")"
@@ -81,6 +113,37 @@ place() {
   STAGED=''
   printf 'Installed: %s\n' "$dst"
 }
-(( need_dlss == 0 )) || place "$TMP/nvngx_dlss.dll" "$RUNTIME/nvngx_dlss.dll"
-(( need_ngx == 0 )) || place "$TMP/ngx/_nvngx.dll" "$RUNTIME/ngx/_nvngx.dll"
-echo 'NVIDIA DLLs installed and verified. Follow the included README for Steam launch options.'
+
+(( DO_DLLS == 0 )) || install_dlls
+if (( DO_ENGINE == 0 )); then
+  echo 'Follow the included README for Steam launch options.'
+  exit 0
+fi
+
+# The engine's models, built from the DLLs above. A stamp of the DLLs and the builder skips an unchanged rebuild.
+BUILDER="$RUNTIME/tools/build-engine-models.sh"
+[[ -f "$BUILDER" ]] || fail "missing $BUILDER (this release has no engine-model builder; use --no-engine)"
+STAMP="$RUNTIME/engine/.d4r-models"
+stamp() {
+  { sha256sum -- "$RUNTIME/nvngx_dlss.dll" "$RUNTIME/nvngx_dlssd.dll" 2>/dev/null | cut -d' ' -f1
+    (cd "$RUNTIME/tools" && find . -type f ! -name '*.pyc' -print0 | LC_ALL=C sort -z | xargs -0 sha256sum); } | sha256sum | cut -d' ' -f1
+}
+models=(rr-d rr-e rr-f k k-ldr m m-ldr l l-ldr)
+complete=1
+for m in "${models[@]}"; do [[ -d "$RUNTIME/engine/$m" ]] || complete=0; done
+if (( REBUILD == 0 && complete )) && [[ -f "$STAMP" && "$(cat "$STAMP")" == "$(stamp)" ]]; then
+  echo 'Engine models are already built for these DLLs (--rebuild-engine builds them again).'
+  exit 0
+fi
+rm -f -- "$STAMP"
+failed=()
+bash "$BUILDER" --rr-only "$RUNTIME" || failed+=('Ray Reconstruction')
+bash "$BUILDER" --sr-only "$RUNTIME" || failed+=('Super Resolution')
+if (( ${#failed[@]} )); then
+  printf 'install.sh: the engine models for %s were not built (reason above). d4r works without them on its\n' \
+    "$(IFS=/; echo "${failed[*]}")" >&2
+  printf 'normal path; fix the cause and run: bash install.sh --engine-only\n' >&2
+  exit 1
+fi
+stamp > "$STAMP"
+echo 'Done. Follow the included README for Steam launch options; set [Engine] Enabled = true in d4r/d4r.ini to use the engine.'
diff --git a/packaging/D4R_README.txt b/packaging/D4R_README.txt
index 2b73cd5..9d8002a 100644
--- a/packaging/D4R_README.txt
+++ b/packaging/D4R_README.txt
@@ -24,8 +24,9 @@ What you need
 - Linux with the amdgpu kernel driver (/dev/kfd). ROCm itself is not needed: the zip includes the
   ROCm 7.2.4 runtime in d4r/rocm. RocmDir in d4r/d4r.ini selects another ROCm installation instead.
 - GE-Proton 11 (tested: GE-Proton11-3), selected for the game in Steam.
-@installer - Internet access, Bash, curl, sha256sum and 7-Zip to run the included install.sh.
-@installer   NVIDIA DLLs are downloaded during installation, under NVIDIA's terms.
+@installer - Internet access, Bash, curl, sha256sum and 7-Zip to run the included install.sh, and python3
+@installer   with numpy for the engine models it builds. NVIDIA DLLs are downloaded during installation,
+@installer   under NVIDIA's terms.
 @clean - Two NVIDIA files, which this zip does not include:
 @clean   - nvngx_dlss.dll, the DLSS library, version 310.7 or 310.9 (tested: 310.7.0 and 310.9.1).
 @clean     Many games ship one, but often an older version. The d4r kernels check the DLSS code they
@@ -34,7 +35,7 @@ What you need
 @clean     driver 596.36, file version 32.0.15.9636). Extract the driver installer, for example with
 @clean     7-Zip, and look for _nvngx.dll.
 @full - Nothing from NVIDIA: this zip already contains NVIDIA's DLSS library (nvngx_dlss.dll 310.7.0),
-@full   NVIDIA's NGX runtime (_nvngx.dll 32.0.15.9636) and output kernels built from NVIDIA's DLSS code.
+@full    NVIDIA's NGX runtime (_nvngx.dll 32.0.15.9636) and output kernels built from NVIDIA's DLSS code.
 
 
 Install
@@ -50,11 +51,18 @@ that archive's d4r/README.txt: setup runs automatically when the ASI loads.
    If the folder already has a dxgi.dll or OptiScaler.ini (another OptiScaler install), move those
    out of the way first. Also remove PROTON_USE_OPTISCALER from the game's launch options if you
    used GE-Proton's built-in OptiScaler: d4r brings its own.
-@installer 2. Run bash install.sh from a terminal (Bash, curl, sha256sum and 7zz/7z/7za required).
-@installer    It downloads DLSS 310.7.0 and the NGX core from official NVIDIA sources, checks SHA-256,
-@installer    and installs d4r/nvngx_dlss.dll and d4r/ngx/_nvngx.dll. No sudo is needed. The driver
-@installer    archive is about 915 MiB; it is extracted, never executed. Downloads are temporary.
-@installer    Run it again to check the files; differing existing DLLs are backed up before replacement.
+@installer 2. Run bash install.sh from a terminal (Bash, curl, sha256sum, 7zz/7z/7za and python3 with numpy
+@installer    required). It downloads DLSS 310.7.0, DLSS Ray Reconstruction 310.9.1 and the NGX core from
+@installer    official NVIDIA sources, checks SHA-256, and installs d4r/nvngx_dlss.dll, d4r/nvngx_dlssd.dll and
+@installer    d4r/ngx/_nvngx.dll. No sudo is needed. The driver archive is about 915 MiB; it is extracted,
+@installer    never executed. Downloads are temporary. Run it again to check the files; differing existing
+@installer    DLLs are backed up before replacement.
+@installer    It then builds the native engine's models in d4r/engine from those DLLs ([Engine] under
+@installer    Settings): Ray Reconstruction D, E and F straight from nvngx_dlssd.dll, and Super Resolution
+@installer    K, M and L (with their LDR variants) by rendering one test frame per model through d4r under
+@installer    GE-Proton 11, found in Steam's compatibility tools (or set D4R_PROTON=/path/to/GE-Proton11-3).
+@installer    The first time this takes a few minutes while DLSS's kernels compile. --no-engine skips it;
+@installer    bash install.sh --engine-only builds the models later, --rebuild-engine builds them again.
 @clean 2. Copy nvngx_dlss.dll into the d4r folder, and _nvngx.dll into d4r/ngx.
 @installer 3. In Steam, open the game's Properties:
 @clean 3. In Steam, open the game's Properties:
@@ -90,25 +98,28 @@ Settings
   gfx12-fp8 kernel folder; set it to false to use f16 widening. The FP8 path has not been tested
   on a real RDNA4 GPU.
 @full - Ray Reconstruction: this zip includes NVIDIA's CUDA-capable denoiser (d4r/nvngx_dlssd.dll
-@full   310.7.0). [RayReconstruction] Enable defaults to auto: when the game turns Ray
-@full   Reconstruction on, d4r runs it through the denoiser. Model = D or E selects a denoiser
-@full   preset explicitly; auto follows the game. RR presets D/E are validated on RX 9070 XT
-@full   (gfx1201) with [Kernels] NativeFp8 = on, the packaged default on RDNA4. Keep NativeFp8 on:
-@full   the scalar FP8 RR path is not validated.
+@full    310.7.0). [RayReconstruction] Enable defaults to auto: when the game turns Ray
+@full    Reconstruction on, d4r runs it through the denoiser. Model = D or E selects a denoiser
+@full    preset explicitly; auto follows the game. RR presets D/E are validated on RX 9070 XT
+@full    (gfx1201) with [Kernels] NativeFp8 = on, the packaged default on RDNA4. Keep NativeFp8 on:
+@full    the scalar FP8 RR path is not validated.
 - If L/M shows extra trails in motion, try [Kernels] NativeSwinEncoders = false with
   PreferAccuracy = true. This uses original translated enc1/enc2 layers while retaining other
   native acceleration. It reduced trails in a captured Townfall sequence on RX 7700 XT and costs
   some GPU time. Restart after changing it; other scenes and RDNA4 hardware still need testing.
-- [Engine] Enabled = true (experimental, off by default) runs DLSS 4 (K) and 4.5 (M and L) on d4r's own
-  Vulkan inference engine: the upscale is recorded into the game's own frame instead of going through CUDA
-  emulation. It needs Mesa RADV with VK_KHR_cooperative_matrix and the models in d4r/engine/k (K),
-  d4r/engine/k-ldr (K in games without HDR), d4r/engine/m and d4r/engine/m-ldr (M), d4r/engine/l and
-  d4r/engine/l-ldr (L). Games and settings it does not cover (other models, display-resolution motion
-  vectors with L or M) keep using the normal path,
-  and d4r/d4r_nvngx.log says which one ran and why. Tested in one game so far.
-  This zip has only the engine's shaders in d4r/engine/k. The weights (weights.bin, offsets.bin,
-  lut.bin) are read from your own nvngx_dlss.dll with the tools in d4r's source repository
-  (engine/README.md); until they are there, d4r uses the normal path.
+- [Engine] Enabled = true (experimental, off by default) runs DLSS 4 (K), 4.5 (M and L) and Ray
+  Reconstruction (D, E and F) on d4r's own Vulkan inference engine: the work is recorded into the game's
+  own frame instead of going through CUDA emulation. It needs Mesa RADV with VK_KHR_cooperative_matrix
+  and the models in d4r/engine: k (K), k-ldr (K in games without HDR), m and m-ldr (M), l and l-ldr (L),
+  rr-d, rr-e and rr-f (Ray Reconstruction). Games and settings it does not cover (other models,
+  display-resolution motion vectors with L or M) keep using the normal path,
+  and d4r/d4r_nvngx.log says which one ran and why. Tested in a few games so far.
+@installer   install.sh builds the models from your NVIDIA DLLs (d4r/tools/build-engine-models.sh). They hold
+@installer   values read from NVIDIA's DLSS: they stay on your machine and must not be shared.
+@full   Build the models with the tools in d4r's source repository (engine/README.md); until they are
+@full   there, d4r uses the normal path.
+@clean   Build the models with the tools in d4r's source repository (engine/README.md); until they are
+@clean   there, d4r uses the normal path.
 - OptiScaler.ini: OptiScaler's settings, such as its fps overlay and the render resolution of each
   quality mode. Press Insert in game for OptiScaler's menu.
   [Libraries] NvngxPath=d4r\nvngx.dll explicitly selects d4r's shim; OptiDllPath=d4r is also
@@ -201,6 +212,8 @@ sections 15 and 16).
 @full NVIDIA's code (listed in d4r/source/SOURCES.txt) are NVIDIA's property, are not covered by
 @full d4r's license, and are included by whoever distributes this zip, not by NVIDIA.
 
-@installer NVIDIA DLLs are downloaded by install.sh from NVIDIA/DLSS SDK 310.7.0 and driver 596.36.
+@installer NVIDIA DLLs are downloaded by install.sh from NVIDIA/DLSS SDK 310.7.0 and 310.9.1 and driver
+@installer 596.36. The engine models install.sh builds from them in d4r/engine are NVIDIA's data, for your
+@installer own use. d4r/tools/models/bin/glslangValidator is Khronos' glslang 16.6.0 (d4r/licenses).
 @installer The included kernels compiled from NVIDIA PTX remain NVIDIA's property and are not
 @installer covered by d4r's license. See d4r/source/SOURCES.txt for their provenance.
diff --git a/packaging/SOURCES.txt b/packaging/SOURCES.txt
index f052638..46babff 100644
--- a/packaging/SOURCES.txt
+++ b/packaging/SOURCES.txt
@@ -9,7 +9,13 @@ Built from source by d4r (GPL-3.0-only, d4r/licenses/d4r-LICENSE.txt):
   d4r/kernels/           native RDNA3/RDNA4 kernels for the DLSS 4 and 4.5 network layers, kernels/k and kernels/m
                          (d4r-kernels.txt lists hashes of the DLSS code each kernel replaces; it holds no NVIDIA code)
   d4r/d4r.ini, d4r/d4r-check.sh, D4R_README.txt
-@installer   install.sh           downloads and verifies NVIDIA DLLs; no driver installation
+@installer   install.sh           downloads and verifies NVIDIA DLLs; no driver installation. Then builds the engine's
+@installer                        models from them with d4r/tools/build-engine-models.sh
+@installer   d4r/tools/models/    d4r's engine-model compilers and shader sources (engine/, kernels/tools, kernels/rr,
+@installer                        vulkan/ptx2glsl.py) and the D3D12 test app (tools/d3d12_dlss_harness.cpp)
+@installer   d4r/tools/models/bin/glslangValidator
+@installer                        Khronos glslang 16.6.0 (unmodified release build), https://github.com/KhronosGroup/glslang
+@installer                        License: d4r/licenses/glslang-LICENSE.txt
 
 Third-party software, unmodified or patched by d4r:
   d4r/zluda/libcuda.so   ZLUDA (Apache License 2.0 or MIT), https://github.com/vosen/ZLUDA
@@ -44,8 +50,10 @@ Third-party software, unmodified or patched by d4r:
 @full   d4r/nvngx_dlss.dll   NVIDIA DLSS Super Resolution library @DLSS_VERSION@
 @full   d4r/ngx/_nvngx.dll   NVIDIA NGX runtime from NVIDIA's Windows display driver, @NGX_VERSION@
 @installer NVIDIA DLLs are not bundled. install.sh downloads DLSS 310.7.0 from NVIDIA/DLSS
-@installer commit a291cc7d2cc642a51566f3dfd5376f635cd1b284 and _nvngx.dll from NVIDIA driver 596.36.
-@installer URLs and SHA-256 hashes are pinned in install.sh. NVIDIA license terms apply.
+@installer commit a291cc7d2cc642a51566f3dfd5376f635cd1b284, DLSS Ray Reconstruction 310.9.1 from commit
+@installer 374959484e79a640feaba44c93ac8cfb0a03f5b5 and _nvngx.dll from NVIDIA driver 596.36.
+@installer URLs and SHA-256 hashes are pinned in install.sh. NVIDIA license terms apply. The engine models
+@installer install.sh builds in d4r/engine hold values read from those DLLs: they are not part of this zip.
 @installer Included NVIDIA PTX-derived kernels (not covered by d4r licenses):
 @installer   d4r/kernels/*/hiluma_engine_*, rrlite_enc0_*, rrlite_dec0_*, rrlite_post_*, rrlite_downsample_*
 @installer                        NVIDIA's PTX with parts replaced by d4r code (kernels/tex) or translated to
diff --git a/packaging/build_engine_models.sh b/packaging/build_engine_models.sh
new file mode 100755
index 0000000..525651f
--- /dev/null
+++ b/packaging/build_engine_models.sh
@@ -0,0 +1,152 @@
+#!/usr/bin/env bash
+# Builds the native engine's models ([Engine] in d4r.ini) on this machine, from the NVIDIA DLLs install.sh put in
+# the d4r folder. Shipped as d4r/tools/build-engine-models.sh; install.sh runs it.
+#
+# usage: bash d4r/tools/build-engine-models.sh [--rr-only | --sr-only] [D4R_FOLDER]
+#
+#   Ray Reconstruction  engine/rr-d, rr-e, rr-f   from d4r/nvngx_dlssd.dll 310.9.1 alone (about half a minute)
+#   Super Resolution    engine/k, k-ldr, m, m-ldr, l, l-ldr
+#                       NVIDIA's DLSS keeps these weights packed in nvngx_dlss.dll; they are read where NGX unpacks
+#                       them: the bundled D3D12 test app renders one frame per model through this d4r folder under
+#                       GE-Proton, and the uploads are saved (a minute or two each; the first run also compiles
+#                       DLSS's kernels and creates a temporary Proton prefix)
+# Needs python3 with numpy, and for Super Resolution a GE-Proton (D4R_PROTON=/path/to/GE-Proton11-3 to choose one).
+# Everything written is derived from NVIDIA's DLLs: it stays in this folder and must not be redistributed.
+set -euo pipefail
+
+fail() { printf 'build-engine-models: %s\n' "$*" >&2; exit 1; }
+DO_RR=1 DO_SR=1
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --rr-only) DO_SR=0; shift ;;
+    --sr-only) DO_RR=0; shift ;;
+    -h|--help) sed -n '2,15p' "${BASH_SOURCE[0]}" | sed 's/^# \{0,1\}//'; exit 0 ;;
+    *) break ;;
+  esac
+done
+TOOLS="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+KIT="$TOOLS/models"
+RUNTIME="$(cd -- "${1:-$TOOLS/..}" && pwd)"
+[[ -f "$RUNTIME/d4r.ini" && -d "$KIT/engine" ]] || fail "no d4r folder with the model tools at $RUNTIME"
+GAME="$(dirname -- "$RUNTIME")"
+DLSSD_SHA256=4bc7ea5fcb2f32cf86bc2cb072e8d2860914a0be511cbdcb2fc206c1d9d83b80   # nvngx_dlssd.dll 310.9.1
+DLSS_SHA256=be6e434a94ca32499515eb62ca0e6c274526055d568d0426e4c652dcdfb6ee6e    # nvngx_dlss.dll 310.7.0
+
+command -v python3 > /dev/null || fail 'python3 is missing (install Python 3)'
+python3 -c 'import numpy' 2> /dev/null || fail 'numpy is missing (install python-numpy / python3-numpy)'
+export PATH="$KIT/bin:$PATH"   # the bundled glslangValidator
+glslangValidator --version > /dev/null 2>&1 || fail "glslangValidator ($KIT/bin) does not run on this system"
+sha() { sha256sum -- "$1" | cut -d' ' -f1; }
+
+WORK="$(mktemp -d "${TMPDIR:-/tmp}/d4r-models.XXXXXX")"
+trap 'rm -rf -- "$WORK"' EXIT
+trap 'exit 130' INT
+trap 'exit 143' TERM
+
+# replace RUNTIME/engine/NAME with the files of a built model that the runtime reads (a rename: safe while a game runs)
+place() {   # place NAME DIR FILE...
+  local name=$1 src=$2 dst="$RUNTIME/engine/$1" f
+  shift 2
+  mkdir -p "$RUNTIME/engine" "$WORK/place/$name"
+  for f in "$@"; do cp -- "$src/$f" "$WORK/place/$name/"; done
+  rm -rf -- "$dst.new"; mv -- "$WORK/place/$name" "$dst.new"
+  rm -rf -- "$dst.old"; [[ ! -e "$dst" ]] || mv -- "$dst" "$dst.old"
+  mv -- "$dst.new" "$dst"; rm -rf -- "$dst.old"
+  printf '  engine/%s (%s files)\n' "$name" "$(ls "$dst" | wc -l)"
+}
+model_files() {   # rr.txt and the files it names, for model directory $1
+  echo rr.txt
+  awk '$1 == "stage" { print $3; if ($5 != "-") print $5; if ($6 ~ /\.args$/) print $6 } $1 == "template" { print $3 }' "$1/rr.txt" | sort -u
+}
+run() {   # run LOG COMMAND...: the command's output in WORK/LOG, shown when it fails
+  local log="$WORK/$1"; shift
+  "$@" > "$log" 2>&1 || { tail -n 20 "$log" >&2; fail "failed: $(basename -- "$2") (log above)"; }
+}
+
+if (( DO_RR )); then
+  DLL="$RUNTIME/nvngx_dlssd.dll"
+  [[ -f "$DLL" && "$(sha "$DLL")" == "$DLSSD_SHA256" ]] || fail "Ray Reconstruction models need nvngx_dlssd.dll 310.9.1 in $RUNTIME (run install.sh)"
+  echo 'Building the Ray Reconstruction models (presets D, E and F) from nvngx_dlssd.dll...'
+  for p in D E; do
+    l=$(tr DE de <<< "$p")
+    bash "$KIT/engine/rr/build_native_model.sh" --dll "$DLL" "$p" "$WORK/rr-$l" > "$WORK/rr-$l.log" 2>&1 ||
+      { tail -n 20 "$WORK/rr-$l.log" >&2; fail "preset $p model failed"; }
+    place "rr-$l" "$WORK/rr-$l" $(model_files "$WORK/rr-$l") exposure_rr0.spv exposure_rr1.spv
+  done
+  run ptx-f.log python3 "$KIT/kernels/tools/extract_dlss_ptx.py" "$DLL" "$WORK/ptx-f"
+  run rr-f.log python3 "$KIT/engine/compile_rr2.py" --dll "$DLL" "$WORK/rr-f" --ptx-dir "$WORK/ptx-f"
+  place rr-f "$WORK/rr-f" $(model_files "$WORK/rr-f") enc0-aux.bin exposure_f0.spv exposure_f1.spv
+fi
+
+if (( DO_SR )); then
+  DLL="$RUNTIME/nvngx_dlss.dll"
+  [[ -f "$DLL" && "$(sha "$DLL")" == "$DLSS_SHA256" ]] || fail "Super Resolution models need nvngx_dlss.dll 310.7.0 in $RUNTIME (run install.sh)"
+  [[ -f "$RUNTIME/ngx/_nvngx.dll" ]] || fail "missing $RUNTIME/ngx/_nvngx.dll (run install.sh)"
+  # a GE-Proton: D4R_PROTON, else GE-Proton11-3 (the tested one), else the newest stock GE-Proton11-N in Steam's
+  # compatibility tools. Renamed or rebuilt variants (2026-10-14: one with a suffix after the version number) can
+  # fail NGX's CUDA initialisation, so they are only used when named.
+  PROTON="${D4R_PROTON:-}"
+  if [[ -z "$PROTON" ]]; then
+    best=-1
+    for d in "$HOME/.local/share/Steam" "$HOME/.steam/root" "$HOME/.steam/steam" \
+             "$HOME/.var/app/com.valvesoftware.Steam/data/Steam"; do
+      for p in "$d"/compatibilitytools.d/GE-Proton11-*; do
+        n="${p##*/GE-Proton11-}"
+        [[ -x "$p/proton" && "$n" =~ ^[0-9]+$ ]] || continue
+        if [[ "$n" == 3 ]]; then best=1000; PROTON="$p"; elif (( n > best )); then best=$n; PROTON="$p"; fi
+      done
+    done
+  fi
+  [[ -n "$PROTON" && -x "$PROTON/proton" ]] ||
+    fail 'no GE-Proton found: set D4R_PROTON=/path/to/GE-Proton11-3 (the folder holding the proton script)'
+  STEAM_ROOT="$(dirname -- "$(dirname -- "$PROTON")")"
+  [[ -d "$STEAM_ROOT/steamapps" || ! -d "$HOME/.local/share/Steam" ]] || STEAM_ROOT="$HOME/.local/share/Steam"
+  # the test app beside the D3D12 pair the game uses (proxy release: the game folder; ASI release: the d4r folder)
+  APP="$WORK/app"; mkdir -p "$APP"
+  cp -- "$KIT/bin/d3d12_dlss_harness.exe" "$APP/"
+  if [[ -f "$RUNTIME/d4r12core.dll" ]]; then
+    cp -- "$RUNTIME/d3d12.dll" "$RUNTIME/d4r12core.dll" "$APP/"
+  elif [[ -f "$GAME/d3d12core.dll" ]]; then
+    cp -- "$GAME/d3d12.dll" "$GAME/d3d12core.dll" "$APP/"
+  else
+    fail "d4r's d3d12.dll / d3d12core.dll not found next to $RUNTIME"
+  fi
+  winpath() { printf 'Z:%s' "$(printf '%s' "$1" | tr '/' '\\')"; }
+  dump() {   # dump NAME PRESET: the uploads of one frame of preset PRESET in WORK/NAME/replay
+    local w="$WORK/$1"
+    mkdir -p "$w/replay"
+    printf '  rendering one frame with model %s through d4r (GE-Proton %s)...\n' "$1" "$(basename "$PROTON")"
+    (cd "$APP" && env STEAM_COMPAT_CLIENT_INSTALL_PATH="$STEAM_ROOT" STEAM_COMPAT_DATA_PATH="$WORK/prefix" \
+      PROTON_FORCE_NVAPI=1 DXVK_NVAPI_GPU_ARCH=AD100 WINEDLLOVERRIDES='d3d12=n,b;d3d12core=n,b;d4r12core=n,b' \
+      D4R_ENGINE=0 D4R_DLSS_PRESET="$2" D4R_HARNESS_CREATE_FLAGS=0x4B D4R_SHIM_LOG="$(winpath "$w/shim.log")" \
+      D4R_CUDA_REPLAY_DUMP_DIR="$w/replay" D4R_CUDA_REPLAY_DUMP_LIMIT=60 \
+      "$PROTON/proton" run "$APP/d3d12_dlss_harness.exe" "$(winpath "$RUNTIME/nvngx.dll")" "$(winpath "$w/out.raw")" \
+      1 640 360 1280 720) > "$w/run.log" 2>&1 || true
+    if ! ls "$w/replay" | grep -q "$3"; then
+      tail -n 15 "$w/run.log" >&2
+      [[ ! -f "$w/shim.log" ]] || tail -n 15 "$w/shim.log" >&2
+      fail "model $1: the test frame did not run through DLSS (logs above)"
+    fi
+  }
+  echo 'Building the Super Resolution models (K, M and L) from what NGX uploads...'
+  mkdir -p "$WORK/prefix"
+  dump k 11 dltss_pwin_dec0_layer
+  run k-extract.log python3 "$KIT/engine/extract_k.py" "$WORK/k/replay" "$WORK/k/model"
+  run k-lut.log python3 "$KIT/engine/prepare_k.py" "$WORK/k" "$WORK/k/case" --lut-only
+  for v in k k-ldr; do
+    run "$v.log" python3 "$KIT/engine/compile_k.py" "$WORK/k/model" "$WORK/k/case/lut.bin" "$WORK/$v-out" \
+      $([[ $v == k-ldr ]] && echo --ldr)
+    place "$v" "$WORK/$v-out" $(ls "$WORK/$v-out")
+  done
+  rm -rf -- "$WORK/k"
+  for c in "m 13 rrlite_enc0_4x4_mvlo_hdr_folded" "l 12 rrlite_enc0_4x4_mvlo_hdr$"; do
+    set -- $c
+    dump "$1" "$2" "$3"
+    for v in "$1" "$1-ldr"; do
+      run "$v.log" python3 "$KIT/engine/compile_m.py" "$WORK/$1" "$WORK/$v-out" $([[ $v == *-ldr ]] && echo --ldr)
+      place "$v" "$WORK/$v-out" $(ls "$WORK/$v-out")
+    done
+    rm -rf -- "${WORK:?}/$1"
+  done
+fi
+printf 'Engine models are in %s/engine.\n' "$RUNTIME"
diff --git a/scripts/check_redistributable.py b/scripts/check_redistributable.py
index 5bede64..858253c 100755
--- a/scripts/check_redistributable.py
+++ b/scripts/check_redistributable.py
@@ -23,6 +23,8 @@ from pathlib import Path, PurePosixPath
 
 # Files the native engine's tools write from NVIDIA's DLSS (engine/README.md); NOTICE names them.
 MODEL_DATA = {'weights.bin', 'offsets.bin', 'lut.bin', 'hipnet.bin', 'model.json'}
+# ... and the M / L and Ray Reconstruction models' (engine/compile_m.py, compile_rr.py, compile_rr2.py)
+MODEL_DATA_PATTERNS = ('weights8.bin', 'weights16.bin', 'weights-*.bin', '*.args', 'enc0-aux.bin', '*.generated.*')
 # Compiled or extracted NVIDIA GPU code.
 NVIDIA_CODE_SUFFIXES = {'.ptx', '.cubin', '.fatbin', '.nvngx'}
 # Kernels kernels/build.sh builds from NVIDIA's PTX (tex/l families and the PTX-translated hiluma kernels).
@@ -62,7 +64,7 @@ def findings_for(path, read, release=None):
     suffix = PurePosixPath(lower).suffix
     full = release == 'full'
     problems = []
-    if lower in MODEL_DATA:
+    if lower in MODEL_DATA or any(fnmatch.fnmatch(lower, pattern) for pattern in MODEL_DATA_PATTERNS):
         problems.append('engine model data read from NVIDIA\'s DLSS')
     if suffix in NVIDIA_CODE_SUFFIXES:
         problems.append('NVIDIA GPU code')
diff --git a/scripts/package_release.sh b/scripts/package_release.sh
index 730849e..6d289ed 100755
--- a/scripts/package_release.sh
+++ b/scripts/package_release.sh
@@ -140,6 +140,8 @@ if [[ "$VARIANT" != clean ]]; then
     [[ "$INSTALL_MODE" != asi ]] || installer_dir="$STAGE/d4r"
     cp "$ROOT/install.sh" "$installer_dir/install.sh"
     chmod +x "$installer_dir/install.sh"
+    # install.sh builds the engine's models from the downloaded DLLs (D4R_GLSLANG, D4R_GLSLANG_LICENSE)
+    "$ROOT/scripts/stage_engine_kit.sh" "$STAGE/d4r"
     # The downloader is pinned to DLSS 310.7.0: refuse mismatched release inputs.
     expected=$(sed -n "s/^DLSS_SHA256=//p" "$ROOT/install.sh")
     [[ "$(sha256sum "$D4R_BUNDLE_DLSS" | cut -d' ' -f1)" == "$expected" ]] || {
diff --git a/scripts/stage_engine_kit.sh b/scripts/stage_engine_kit.sh
new file mode 100755
index 0000000..45a384d
--- /dev/null
+++ b/scripts/stage_engine_kit.sh
@@ -0,0 +1,51 @@
+#!/usr/bin/env bash
+# Puts the engine-model builder into a release's d4r folder: d4r/tools/build-engine-models.sh (install.sh runs it)
+# and d4r/tools/models/ with d4r's model compilers and shader sources, the D3D12 test app and glslangValidator.
+# Only d4r's own code and Khronos' glslang go in; the models are built on the user's machine from their DLLs.
+#
+# usage: scripts/stage_engine_kit.sh D4R_FOLDER
+#   D4R_GLSLANG      glslang release archive or extracted folder (bin/glslangValidator; Khronos 16.6.0 tested)
+#   D4R_GLSLANG_LICENSE  its LICENSE.txt (the release archives have none; the tag's LICENSE.txt in KhronosGroup/glslang)
+#   D4R_HARNESS_EXE  the D3D12 test app (default build/d3d12_dlss_harness.exe, scripts/build_d3d12_dlss_harness.sh)
+set -euo pipefail
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+D4R="$(realpath "${1:?usage: stage_engine_kit.sh D4R_FOLDER}")"
+: "${D4R_GLSLANG:?set D4R_GLSLANG to a glslang release (glslang-16.6.0-linux-x86_64-release.tar.gz)}"
+: "${D4R_GLSLANG_LICENSE:?set D4R_GLSLANG_LICENSE to the LICENSE.txt of glslang}"
+HARNESS="${D4R_HARNESS_EXE:-$ROOT/build/d3d12_dlss_harness.exe}"
+[[ -f "$HARNESS" ]] || { echo "missing $HARNESS (scripts/build_d3d12_dlss_harness.sh)" >&2; exit 2; }
+KIT="$D4R/tools/models"
+rm -rf "$KIT"
+mkdir -p "$KIT/bin" "$KIT/engine/rr" "$KIT/kernels/tools" "$KIT/kernels/rr" "$KIT/vulkan" "$D4R/licenses"
+copy() {   # copy SRC_DIR DST_DIR PATTERN...: never tests
+  local src=$1 dst=$2 pat f
+  shift 2
+  for pat in "$@"; do
+    for f in "$ROOT/$src"/$pat; do
+      [[ -f "$f" ]] || continue
+      case "$(basename "$f")" in test_*) continue ;; esac
+      cp "$f" "$dst/"
+    done
+  done
+}
+copy engine "$KIT/engine" '*.py' '*.comp' '*.glsl'
+copy engine/rr "$KIT/engine/rr" '*.py' '*.comp' '*.glsl' '*.txt' '*.npy' '*.sh'
+copy kernels/tools "$KIT/kernels/tools" '*.py'
+copy kernels/rr "$KIT/kernels/rr" '*.py'
+copy vulkan "$KIT/vulkan" '*.py'   # ptx2glsl.py: engine/rr/ptx2rr.py builds on it
+# the model compilers import these test modules' packing helpers
+cp "$ROOT/engine/test_k.py" "$ROOT/engine/test_m.py" "$KIT/engine/"
+cp "$ROOT/engine/rr/test_layer.py" "$KIT/engine/rr/"
+cp "$HARNESS" "$KIT/bin/d3d12_dlss_harness.exe"
+TMP="$(mktemp -d)"; trap 'rm -rf "$TMP"' EXIT
+GL="$D4R_GLSLANG"
+if [[ -f "$GL" ]]; then
+  case "$GL" in *.zip) unzip -q "$GL" -d "$TMP" ;; *) tar xf "$GL" -C "$TMP" ;; esac
+  GL="$TMP"
+fi
+cp "$GL/bin/glslangValidator" "$KIT/bin/glslangValidator"
+chmod +x "$KIT/bin/glslangValidator"
+cp "$D4R_GLSLANG_LICENSE" "$D4R/licenses/glslang-LICENSE.txt"
+cp "$ROOT/packaging/build_engine_models.sh" "$D4R/tools/build-engine-models.sh"
+chmod +x "$D4R/tools/build-engine-models.sh"
+printf 'Staged the engine-model builder in %s (%s)\n' "$D4R/tools" "$(du -sh "$D4R/tools" | cut -f1)"