[1.3.69] 2026-03-16

## Radiation
- Removed bundled OptiX 5.1 libraries and headers (linux64-5.1.0, windows64-5.1.1) and all legacy `OPTIX_VERSION_LEGACY` CMake code paths, since OptiX 5.1 support was superseded by OptiX 6.5 and 8.1 backends.
- Fixed multi-tile camera rendering in the OptiX 8 backend where `__raygen__camera()` and `__raygen__pixel_label()` used per-tile resolution instead of full image resolution for ray direction computation, causing black pixels in tiles beyond the first (e.g., iPhone 12 Pro Max at 3024×4032 with 100 AA samples).
- Fixed camera closest-hit for triangle primitives in the OptiX 8 backend to use the intersection program's face attribute instead of recomputing the surface normal from canonical patch vertices, which produced incorrect face orientation and black triangle pixels.
- Fixed camera pixel buffer zeroing in the OptiX 6 backend so that multi-tile renders for the same camera accumulate correctly rather than re-zeroing between tiles.
- Specular reflection was missing in OptiX 8 camera rendering path: camera-weighted source fluxes are now uploaded and specular contributions are accumulated per-camera in the direct miss program.

Author: bnbailey-psl

AGENTS.md

@@ -1343,8 +1343,6 @@ uint Context::addConeObject(uint Ndivs, const vec3 &node0, const vec3 &node1, fl
         getPrimitivePointer_private(p)->setParentObjectID(currentObjectID);
     }
 
-    cone_new->setColor(color);
-
     objects[currentObjectID] = cone_new;
     currentObjectID++;
 

core/src/Context_object.cpp

@@ -1,5 +1,20 @@
 # Changelog
 
+# [1.3.69] 2026-03-16
+
+## Core
+- Removed redundant `setColor()` call in `addConeObject()` that was re-applying the color already set on individual triangles during construction.
+
+## Plant Architecture
+- Renamed generic `Material.002` material in `PetiolulePrototype` OBJ/MTL assets to descriptive `petiolule` label.
+
+## Radiation
+- Removed bundled OptiX 5.1 libraries and headers (linux64-5.1.0, windows64-5.1.1) and all legacy `OPTIX_VERSION_LEGACY` CMake code paths, since OptiX 5.1 support was superseded by OptiX 6.5 and 8.1 backends.
+- Fixed multi-tile camera rendering in the OptiX 8 backend where `__raygen__camera()` and `__raygen__pixel_label()` used per-tile resolution instead of full image resolution for ray direction computation, causing black pixels in tiles beyond the first (e.g., iPhone 12 Pro Max at 3024×4032 with 100 AA samples).
+- Fixed camera closest-hit for triangle primitives in the OptiX 8 backend to use the intersection program's face attribute instead of recomputing the surface normal from canonical patch vertices, which produced incorrect face orientation and black triangle pixels.
+- Fixed camera pixel buffer zeroing in the OptiX 6 backend so that multi-tile renders for the same camera accumulate correctly rather than re-zeroing between tiles.
+- Specular reflection was missing in OptiX 8 camera rendering path: camera-weighted source fluxes are now uploaded and specular contributions are accumulated per-camera in the direct miss program.
+
 # [1.3.68] 2026-03-15
 
 ## Core

doc/CHANGELOG.md

@@ -1,7 +1,7 @@
 # Blender 3.3.0 MTL File: 'None'
 # www.blender.org
 
-newmtl Material.002
+newmtl petiolule
 Ns 250.000000
 Ka 1.000000 1.000000 1.000000
 Kd 0.210000 0.250000 0.050000

plugins/plantarchitecture/assets/obj/PetiolulePrototype.mtl

@@ -85,7 +85,7 @@ v 0.089140 0.012770 0.010680
 v 0.094604 0.014189 0.010659
 v 0.100534 0.015063 0.010636
 s 0
-usemtl Material.002
+usemtl petiolule
 f 2 24 1
 f 4 1 3
 f 9 6 7

plugins/plantarchitecture/assets/obj/PetiolulePrototype.obj

@@ -41,11 +41,7 @@ if(CUDAToolkit_FOUND AND NOT FORCE_VULKAN_BACKEND)
 	set(CMAKE_CUDA_COMPILER ${CUDAToolkit_NVCC_EXECUTABLE})
 
 	# Set CUDA architectures before enabling CUDA language
-	if( OPTIX_VERSION_LEGACY )
-		set(CMAKE_CUDA_ARCHITECTURES "35")
-	else()
-		include("${CMAKE_BINARY_DIR}/lib/detect_GPU_compute.cmake")
-	endif()
+	include("${CMAKE_BINARY_DIR}/lib/detect_GPU_compute.cmake")
 
 	# Enable CUDA as a language (modern CMake approach)
 	enable_language(CUDA)
@@ -282,6 +278,7 @@ set(OPTIX8_IR_OUTPUT "${CMAKE_BINARY_DIR}/plugins/radiation/OptiX8DeviceCode.opt
 set(OPTIX8_NVCC_FLAGS
 	--optix-ir
 	--use_fast_math
+	-diag-suppress 20044
 	-I${CMAKE_CURRENT_SOURCE_DIR}/src/optix8
 	-I${CMAKE_CURRENT_SOURCE_DIR}/include
 	-I${_OPTIX8_INCLUDE}
@@ -359,28 +356,16 @@ endif()
 target_link_libraries(radiation PUBLIC CUDA::cudart_static)
 
 if(UNIX AND NOT APPLE)
-	if( OPTIX_VERSION_LEGACY )
-		set(OPTIX_PATH ${CMAKE_CURRENT_SOURCE_DIR}/lib/OptiX/linux64-5.1.0/)
-		message("Using legacy OptiX version 5.1")
-	else()
-		set(OPTIX_PATH ${CMAKE_CURRENT_SOURCE_DIR}/lib/OptiX/linux64-6.5.0/)
-		message("Using OptiX version 6.5")
-	endif()
+	set(OPTIX_PATH ${CMAKE_CURRENT_SOURCE_DIR}/lib/OptiX/linux64-6.5.0/)
+	message(STATUS "[Radiation] Using OptiX version 6.5")
 	target_include_directories(radiation PUBLIC "${OPTIX_PATH}include" )
 	target_link_libraries( radiation PUBLIC ${OPTIX_PATH}lib64/liboptix.so )
 endif(UNIX AND NOT APPLE)
 if(WIN32)
-	if( OPTIX_VERSION_LEGACY )
-		set(OPTIX_PATH ${CMAKE_CURRENT_SOURCE_DIR}/lib/OptiX/windows64-5.1.1/)
-		set(OPTIX_LIB "optix.51.lib")
-		set(OPTIX_DLL "optix.51.dll")
-		message("Using legacy OptiX version 5.1")
-	else()
-		set(OPTIX_PATH ${CMAKE_CURRENT_SOURCE_DIR}/lib/OptiX/windows64-6.5.0/)
-		set(OPTIX_LIB "optix.6.5.0.lib")
-		set(OPTIX_DLL "optix.6.5.0.dll")
-		message("Using OptiX version 6.5")
-	endif()
+	set(OPTIX_PATH ${CMAKE_CURRENT_SOURCE_DIR}/lib/OptiX/windows64-6.5.0/)
+	set(OPTIX_LIB "optix.6.5.0.lib")
+	set(OPTIX_DLL "optix.6.5.0.dll")
+	message(STATUS "[Radiation] Using OptiX version 6.5")
 	target_include_directories(radiation PUBLIC "${OPTIX_PATH}include" )
 	target_link_libraries( radiation PUBLIC "${OPTIX_PATH}lib64/${OPTIX_LIB}" )
 	add_custom_command( TARGET radiation POST_BUILD COMMAND ${CMAKE_COMMAND} -E copy "${OPTIX_PATH}lib64/${OPTIX_LIB}" "${CMAKE_BINARY_DIR}/." )