Add CUDA NGX Ray Reconstruction support

Run the signed CUDA-capable denoiser through feature 13 with independent D/E presets, pre-Init discovery, per-frame guide and camera snapshots, normalized integer guide staging, paired alpha output, and recorded-resource retirement.

Add the required ZLUDA/LLVM patch, behavioral configuration tests, GPU harness coverage, optional denoiser installation and packaging, and tested support limitations. Preserve upstream attribution and distinguish LLVM licensing from the ZLUDA portions of the patch.

scripts/install_d4r_runtime.sh

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+# Modified in this fork for CUDA Ray Reconstruction support and validation (2026).
 set -euo pipefail
 
 # Stages the pieces a Proton game needs under D4R_RUNTIME_DIR
@@ -7,6 +8,7 @@ set -euo pipefail
 #   bin/d4r_nvngx.dll   D3D12-to-CUDA NGX core shim (OptiScaler NvngxPath target)
 #   ngx/_nvngx.dll      official NGX core
 #   dlss/nvngx_dlss.dll official DLSS SR feature DLL (also copied into bin/)
+#   dlss/nvngx_dlssd.dll optional DLSS Ray Reconstruction feature DLL (also in bin/)
 #   engine/k/, k-ldr/   models of preset K for the native engine ([Engine] in d4r.ini), when D4R_ENGINE_MODEL /
 #                       D4R_ENGINE_MODEL_LDR name the folders engine/compile_k.py wrote (--ldr for the second)
 #   engine/m/, m-ldr/   models of preset M, when D4R_ENGINE_MODEL_M / D4R_ENGINE_MODEL_M_LDR name the folders
@@ -14,9 +16,9 @@ set -euo pipefail
 #   engine/l/, l-ldr/   models of preset L, when D4R_ENGINE_MODEL_L / D4R_ENGINE_MODEL_L_LDR name the folders
 #                       engine/compile_m.py wrote from a capture of preset L
 # Each model folder is copied whole, with the native HIP network's hipnet.bin and hip/ when built with --hip.
-# usage: install_d4r_runtime.sh PATH_TO_NGX_CORE_DLL PATH_TO_NVNGX_DLSS_DLL
-if [[ $# -ne 2 ]]; then
-  printf 'usage: %s PATH_TO_NGX_CORE_DLL PATH_TO_NVNGX_DLSS_DLL\n' "$0" >&2
+# usage: install_d4r_runtime.sh PATH_TO_NGX_CORE_DLL PATH_TO_NVNGX_DLSS_DLL [PATH_TO_NVNGX_DLSSD_DLL]
+if [[ $# -lt 2 || $# -gt 3 ]]; then
+  printf 'usage: %s PATH_TO_NGX_CORE_DLL PATH_TO_NVNGX_DLSS_DLL [PATH_TO_NVNGX_DLSSD_DLL]\n' "$0" >&2
   exit 2
 fi
 ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
@@ -51,5 +53,10 @@ for variant in k k-ldr m m-ldr l l-ldr; do
   cp -r "$source_dir" "$RUNTIME/engine/$variant"
   printf 'Installed the native engine model in %s\n' "$RUNTIME/engine/$variant"
 done
+if [[ $# == 3 ]]; then
+  copy_unless_same "$3" "$RUNTIME/dlss/nvngx_dlssd.dll"
+  copy_unless_same "$3" "$RUNTIME/bin/nvngx_dlssd.dll"
+  sha256sum "$RUNTIME/dlss/nvngx_dlssd.dll"
+fi
 sha256sum "$RUNTIME"/ngx/_nvngx.dll "$RUNTIME"/dlss/nvngx_dlss.dll
 printf 'Installed d4r runtime in %s\n' "$RUNTIME"