Does LuxCoreRender v2.5 support Intel Iris Xe?

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3d_render_user
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Joined: Mon May 17, 2021 5:21 am

Does LuxCoreRender v2.5 support Intel Iris Xe?

Post by 3d_render_user »

I have a second laptop running the Intel Iris Xe card, after launching LuxCoreGui.exe, selecting PATHOCL, it stuck at "compiling kernels" forever (I waited for >1 hour)

LuxCoreUI v2.5 (LuxCore demo: http://www.luxcorerender.org)
[LuxCore][4.094] Configuration:
[LuxCore][4.094] film.width = "800"
[LuxCore][4.094] film.height = "800"
[LuxCore][4.094] scene.file = "scenes/cornell/cornell.scn"
[LuxCore][4.094] path.photongi.indirect.enabled = "0"
[LuxCore][4.094] path.photongi.caustic.enabled = "0"
[LuxCore][4.094] path.pathdepth.total = "5"
[LuxCore][4.094] film.imagepipelines.0.0.type = "TONEMAP_LINEAR"
[LuxCore][4.094] film.imagepipelines.0.0.scale = "1"
[LuxCore][4.094] film.imagepipelines.0.1.type = "GAMMA_CORRECTION"
[LuxCore][4.094] film.imagepipelines.0.1.value = "2.2"
[LuxCore][4.094] film.outputs.0.type = "RGB_IMAGEPIPELINE"
[LuxCore][4.094] film.outputs.0.index = "0"
[LuxCore][4.094] film.outputs.0.filename = "normal.png"
[LuxCore][4.094] film.outputs.1.type = "RGB_IMAGEPIPELINE"
[LuxCore][4.094] film.outputs.1.index = "1"
[LuxCore][4.094] film.outputs.1.filename = "denoised.png"
[LuxCore][4.094] film.outputs.2.type = "ALBEDO"
[LuxCore][4.094] film.outputs.2.filename = "cornell_ALBEDO.png"
[LuxCore][4.094] film.outputs.3.type = "AVG_SHADING_NORMAL"
[LuxCore][4.094] film.outputs.3.filename = "cornell_AVG_SHADING_NORMAL.exr"
[LuxCore][4.094] File Name Resolver Configuration:
[LuxCore][4.094] .
[LuxCore][4.094] C:/luxcorerender-v2.5-win64/scenes/cornell
[SDL][4.094] Reading scene: ./cornell.scn
[SDL][4.110] Define ImageMap: NamedObject
[SDL][4.110] Material definition: Khaki
[SDL][4.110] Material definition: HalveRed
[SDL][4.110] Material definition: DarkGreen
[SDL][4.110] Material definition: Light
[SDL][4.110] Camera type: perspective
[SDL][4.110] Camera position: Point[-2.78, -8, 2.73]
[SDL][4.110] Camera target: Point[-2.78, 2, 2.73]
[SDL][4.110] Camera clipping plane disabled
[SDL][4.141] The Grey object is a light sources with 2 triangles
[SDL][4.141] Scene objects count: 4
[SDL][4.141] Camera type: perspective
[SDL][4.141] Camera position: Point[-2.78, -8, 2.73]
[SDL][4.141] Camera target: Point[-2.78, 2, 2.73]
[SDL][4.141] Camera clipping plane disabled
Film size adjusted: 960x540 (Frame buffer size: 960x540)
RenderConfig has cached kernels: True
[LuxCore][4.141] Film resolution: 960x540
[SDL][4.141] Film output definition: RGB_IMAGEPIPELINE [image.png]
[SDL][4.141] Image pipeline: film.imagepipelines.0
[SDL][4.141] Image pipeline step 0: TONEMAP_LINEAR
[SDL][4.141] Image pipeline step 1: GAMMA_CORRECTION
[SDL][4.141] Film output definition: RGB_IMAGEPIPELINE [normal.png]
[SDL][4.141] Film output definition: RGB_IMAGEPIPELINE [denoised.png]
[SDL][4.141] Film output definition: ALBEDO [cornell_ALBEDO.png]
[SDL][4.157] Film output definition: AVG_SHADING_NORMAL [cornell_AVG_SHADING_NORMAL.exr]
[LuxRays][4.157] OpenCL support: enabled
[LuxRays][4.250] OpenCL Platform 0: Intel(R) OpenCL HD Graphics
[LuxRays][4.250] CUDA support: enabled
[LuxRays][4.250] Device 0 name: Native
[LuxRays][4.250] Device 0 type: NATIVE_THREAD
[LuxRays][4.250] Device 0 compute units: 1
[LuxRays][4.250] Device 0 preferred float vector width: 4
[LuxRays][4.250] Device 0 max allocable memory: 17592186044415MBytes
[LuxRays][4.250] Device 0 max allocable memory block size: 17592186044415MBytes
[LuxRays][4.250] Device 0 has out of core memory support: 0
[LuxRays][4.250] Device 1 name: Intel(R) Iris(R) Xe Graphics
[LuxRays][4.266] Device 1 type: OPENCL_GPU
[LuxRays][4.266] Device 1 compute units: 80
[LuxRays][4.266] Device 1 preferred float vector width: 1
[LuxRays][4.266] Device 1 max allocable memory: 3144MBytes
[LuxRays][4.266] Device 1 max allocable memory block size: 1572MBytes
[LuxRays][4.266] Device 1 has out of core memory support: 0
[LuxRays][4.266] Creating 8 intersection device(s)
[LuxRays][4.266] Allocating intersection device 0: Native (Type = NATIVE_THREAD)
[LuxRays][4.266] Allocating intersection device 1: Native (Type = NATIVE_THREAD)
[LuxRays][4.266] Allocating intersection device 2: Native (Type = NATIVE_THREAD)
[LuxRays][4.266] Allocating intersection device 3: Native (Type = NATIVE_THREAD)
[LuxRays][4.266] Allocating intersection device 4: Native (Type = NATIVE_THREAD)
[LuxRays][4.266] Allocating intersection device 5: Native (Type = NATIVE_THREAD)
[LuxRays][4.266] Allocating intersection device 6: Native (Type = NATIVE_THREAD)
[LuxRays][4.266] Allocating intersection device 7: Native (Type = NATIVE_THREAD)
[LuxCore][4.266] Configuring 8 CPU render threads
[LuxRays][4.266] Preprocessing DataSet
[LuxRays][4.266] Total vertex count: 64
[LuxRays][4.266] Total triangle count: 32
[LuxRays][4.266] Preprocessing DataSet done
[LuxRays][4.266] Adding DataSet accelerator: EMBREE
[LuxRays][4.266] Total vertex count: 64
[LuxRays][4.266] Total triangle count: 32
[LuxRays][4.297] EmbreeAccel build time: 31ms
[LuxCore][4.297] Film hardware image pipeline
[LuxCore][4.297] Film hardware device used: Intel(R) Iris(R) Xe Graphics OpenCLIntersect (Type: OPENCL_GPU)
[LuxCore][4.297] Device OpenCL version: OpenCL 3.0 NEO
[LuxRays][4.297] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] IMAGEPIPELINE buffer size: 6075Kbytes
[LuxRays][4.297] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Merge buffer size: 8100Kbytes
[LuxRays][4.297] [MergeSampleBuffersOCL] Compiler options: -D LUXRAYS_OPENCL_KERNEL -D SLG_OPENCL_KERNEL -D LUXRAYS_OPENCL_DEVICE -D LUXRAYS_OS_WINDOWS -cl-fast-relaxed-math -cl-mad-enable
[LuxRays][4.313] [MergeSampleBuffersOCL] Compiling kernels
[LuxRays][4.313] [MergeSampleBuffersOCL] Program cached
[LuxCore][4.313] [MergeSampleBuffersOCL] Compiling Film_MergeBufferInitialize Kernel
[LuxCore][4.313] [MergeSampleBuffersOCL] Compiling Film_MergeRADIANCE_PER_PIXEL_NORMALIZED Kernel
[LuxCore][4.313] [MergeSampleBuffersOCL] Compiling Film_MergeRADIANCE_PER_SCREEN_NORMALIZED Kernel
[LuxCore][4.313] [MergeSampleBuffersOCL] Compiling Film_MergeBufferFinalize Kernel
[LuxCore][4.313] [MergeSampleBuffersOCL] Kernels compilation time: 15ms
[LuxRays][4.329] [LinearToneMap] Compiler options: -D LUXRAYS_OPENCL_KERNEL -D SLG_OPENCL_KERNEL -D LUXRAYS_OPENCL_DEVICE -D LUXRAYS_OS_WINDOWS -cl-fast-relaxed-math -cl-mad-enable
[LuxRays][4.329] [LinearToneMap] Compiling kernels
[LuxRays][4.329] [LinearToneMap] Program cached
[LuxCore][4.329] [AutoLinearToneMap] Compiling LinearToneMap_Apply Kernel
[LuxCore][4.344] [LinearToneMap] Kernels compilation time: 15ms
[LuxRays][4.344] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Gamma table buffer size: 16Kbytes
[LuxRays][4.344] [GammaCorrectionPlugin] Compiler options: -D LUXRAYS_OPENCL_KERNEL -D SLG_OPENCL_KERNEL -D LUXRAYS_OPENCL_DEVICE -D LUXRAYS_OS_WINDOWS -cl-fast-relaxed-math -cl-mad-enable
[LuxRays][4.344] [GammaCorrectionPlugin] Compiling kernels
[LuxRays][4.344] [GammaCorrectionPlugin] Program cached
[LuxCore][4.344] [GammaCorrectionPlugin] Compiling GammaCorrectionPlugin_Apply Kernel
[LuxCore][4.344] [GammaCorrectionPlugin] Kernels compilation time: 0ms
[LuxCore][7.719] [Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Memory used for hardware image pipeline: 14175Kbytes
[SDL][7.719] Camera type: perspective
[SDL][7.719] Camera position: Point[-2.78, -8, 2.73]
[SDL][7.719] Camera target: Point[-2.78, 2, 2.73]
[SDL][7.719] Camera clipping plane disabled
Film size adjusted: 960x540 (Frame buffer size: 960x540)
RenderConfig has cached kernels: False
[LuxCore][7.719] Film resolution: 960x540
[SDL][7.719] Film output definition: RGB_IMAGEPIPELINE [image.png]
[SDL][7.735] Image pipeline: film.imagepipelines.0
[SDL][7.735] Image pipeline step 0: TONEMAP_LINEAR
[SDL][7.735] Image pipeline step 1: GAMMA_CORRECTION
[SDL][7.735] Film output definition: RGB_IMAGEPIPELINE [normal.png]
[SDL][7.735] Film output definition: RGB_IMAGEPIPELINE [denoised.png]
[SDL][7.735] Film output definition: ALBEDO [cornell_ALBEDO.png]
[SDL][7.735] Film output definition: AVG_SHADING_NORMAL [cornell_AVG_SHADING_NORMAL.exr]
[LuxRays][7.735] OpenCL support: enabled
[LuxRays][7.735] OpenCL Platform 0: Intel(R) OpenCL HD Graphics
[LuxRays][7.735] CUDA support: enabled
[LuxRays][7.735] Device 0 name: Native
[LuxRays][7.735] Device 0 type: NATIVE_THREAD
[LuxRays][7.735] Device 0 compute units: 1
[LuxRays][7.735] Device 0 preferred float vector width: 4
[LuxRays][7.735] Device 0 max allocable memory: 17592186044415MBytes
[LuxRays][7.735] Device 0 max allocable memory block size: 17592186044415MBytes
[LuxRays][7.735] Device 0 has out of core memory support: 0
[LuxRays][7.735] Device 1 name: Intel(R) Iris(R) Xe Graphics
[LuxRays][7.735] Device 1 type: OPENCL_GPU
[LuxRays][7.735] Device 1 compute units: 80
[LuxRays][7.735] Device 1 preferred float vector width: 1
[LuxRays][7.735] Device 1 max allocable memory: 3144MBytes
[LuxRays][7.735] Device 1 max allocable memory block size: 1572MBytes
[LuxRays][7.735] Device 1 has out of core memory support: 0
[LuxRays][7.735] Creating 9 intersection device(s)
[LuxRays][7.735] Allocating intersection device 0: Intel(R) Iris(R) Xe Graphics (Type = OPENCL_GPU)
[LuxRays][7.735] Allocating intersection device 1: Native (Type = NATIVE_THREAD)
[LuxRays][7.735] Allocating intersection device 2: Native (Type = NATIVE_THREAD)
[LuxRays][7.735] Allocating intersection device 3: Native (Type = NATIVE_THREAD)
[LuxRays][7.735] Allocating intersection device 4: Native (Type = NATIVE_THREAD)
[LuxRays][7.735] Allocating intersection device 5: Native (Type = NATIVE_THREAD)
[LuxRays][7.735] Allocating intersection device 6: Native (Type = NATIVE_THREAD)
[LuxRays][7.735] Allocating intersection device 7: Native (Type = NATIVE_THREAD)
[LuxRays][7.735] Allocating intersection device 8: Native (Type = NATIVE_THREAD)
[LuxCore][7.735] CUDA devices used:
[LuxCore][7.735] OpenCL devices used:
[LuxCore][7.735] [Intel(R) Iris(R) Xe Graphics OpenCLIntersect]
[LuxCore][7.735] Device OpenCL version: OpenCL 3.0 NEO
[LuxCore][7.750] Native devices used: 8
[LuxCore][7.750] Configuring 1 OpenCL render threads
[LuxCore][7.750] Configuring 8 native render threads
[LuxRays][7.750] Preprocessing DataSet
[LuxRays][7.750] Total vertex count: 64
[LuxRays][7.750] Total triangle count: 32
[LuxRays][7.750] Preprocessing DataSet done
[LuxRays][7.750] Adding DataSet accelerator: BVH
[LuxRays][7.750] Total vertex count: 64
[LuxRays][7.750] Total triangle count: 32
[LuxRays][7.750] BVH Dataset preprocessing time: 0ms
[LuxRays][7.750] BVH builder: EMBREE_BINNED_SAH
[LuxRays][7.750] BVH build hierarchy time: 0ms
[LuxRays][7.750] BVH total build time: 0ms
[LuxRays][7.750] Total BVH memory usage: 1Kbytes
[LuxRays][7.750] Adding DataSet accelerator: EMBREE
[LuxRays][7.750] Total vertex count: 64
[LuxRays][7.750] Total triangle count: 32
[LuxRays][7.750] EmbreeAccel build time: 0ms
[LuxRays][7.750] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] BVH mesh vertices buffer size: 768bytes
[LuxRays][7.750] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] BVH nodes buffer size: 1536bytes
[LuxRays][7.750] [BVHKernel] Compiler options: -D LUXRAYS_OPENCL_KERNEL -D PARAM_RAY_EPSILON_MIN=1e-05f -D PARAM_RAY_EPSILON_MAX=0.1f -D LUXRAYS_OPENCL_DEVICE -D LUXRAYS_OS_WINDOWS -cl-fast-relaxed-math -cl-mad-enable
[LuxRays][7.750] [BVHKernel] Compiling kernels
[LuxRays][7.766] [BVHKernel] Program cached
[LuxCore][7.782] [PathOCLRenderEngine] OpenCL task count: 131072
[LuxCore][7.797] [PathOCLBaseRenderEngine] OpenCL max. page memory size: 1609810Kbytes
[LuxCore][7.797] Compile Geometry
[LuxCore][7.797] Scene geometry compilation time: 0ms
[LuxCore][7.797] Compile 5 Textures
[LuxCore][7.797] Texture evaluation ops count: 15
[LuxCore][7.797] Texture evaluation max. stack size: 3
[LuxCore][7.797] Textures compilation time: 0ms
[LuxCore][7.797] Compile 4 Materials
[LuxCore][7.797] Material evaluation ops count: 28
[LuxCore][7.797] Material evaluation max. stack size: 8
[LuxCore][7.797] Material compilation time: 0ms
[LuxCore][7.797] Compile Lights
[LuxCore][7.797] Lights compilation time: 0ms
[LuxCore][7.797] Compile ImageMaps
[LuxCore][7.797] Image maps page(s) count: 1
[LuxCore][7.797] RGB channel page 0 size: 3072Kbytes
[LuxCore][7.797] Image maps compilation time: 0ms
[LuxCore][7.797] Always enabled OpenCL code:
[LuxCore][7.797] Compile Geometry
[LuxCore][7.797] Scene geometry compilation time: 0ms
[LuxCore][7.797] Compile 5 Textures
[LuxCore][7.797] Texture evaluation ops count: 15
[LuxCore][7.797] Texture evaluation max. stack size: 3
[LuxCore][7.797] Textures compilation time: 0ms
[LuxCore][7.797] Compile 4 Materials
[LuxCore][7.797] Material evaluation ops count: 28
[LuxCore][7.797] Material evaluation max. stack size: 8
[LuxCore][7.797] Material compilation time: 0ms
[LuxCore][7.797] Compile Lights
[LuxCore][7.797] Lights compilation time: 0ms
[LuxCore][7.813] Compile ImageMaps
[LuxCore][7.813] Image maps page(s) count: 1
[LuxCore][7.813] RGB channel page 0 size: 3072Kbytes
[LuxCore][7.813] Image maps compilation time: 0ms
[LuxCore][7.813] Starting 1 OpenCL render threads
[LuxRays][7.844] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] RADIANCE_PER_PIXEL_NORMALIZEDs[0] buffer size: 8100Kbytes
[LuxRays][7.844] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] ALBEDO buffer size: 8100Kbytes
[LuxRays][7.844] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] AVG_SHADING_NORMAL buffer size: 8100Kbytes
[LuxRays][7.844] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] NOISE buffer size: 2025Kbytes
[LuxRays][7.860] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] RADIANCE_PER_PIXEL_NORMALIZEDs[0] buffer size: 8100Kbytes
[LuxRays][7.860] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Camera buffer size: 5492bytes
[LuxRays][7.860] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Triangle normals buffer size: 384bytes
[LuxRays][7.860] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Vertices buffer size: 768bytes
[LuxRays][7.860] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Triangles buffer size: 384bytes
[LuxRays][7.860] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Mesh description buffer size: 1248bytes
[LuxRays][7.860] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] ImageMap descriptions buffer size: 32bytes
[LuxRays][7.860] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] ImageMaps buffer size: 3072Kbytes
[LuxRays][7.860] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Textures buffer size: 1580bytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Texture evaluation ops buffer size: 120bytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Texture evaluation stacks buffer size: 1536Kbytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Materials buffer size: 912bytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Material evaluation ops buffer size: 336bytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Material evaluation stacks buffer size: 4096Kbytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Scene objects buffer size: 96bytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Lights buffer size: 688bytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Light offsets (Part I) buffer size: 16bytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Light offsets (Part II) buffer size: 8bytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] LightsDistribution buffer size: 24bytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] InfiniteLightSourcesDistribution buffer size: 24bytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Ray buffer size: 6144Kbytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] RayHit buffer size: 2560Kbytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] GPUTaskConfiguration buffer size: 328bytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] GPUTask buffer size: 84992Kbytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] GPUTaskDirectLight buffer size: 7680Kbytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] GPUTaskState buffer size: 50176Kbytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] GPUTask Stats buffer size: 512Kbytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] SamplerSharedData buffer size: 2032Kbytes
[LuxCore][7.875] [PathOCLBaseRenderThread::0] Size of a Sample: 40bytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Sample buffer size: 5120Kbytes
[LuxCore][7.875] [PathOCLBaseRenderThread::0] Size of a SampleData: 8bytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] SampleData buffer size: 1024Kbytes
[LuxCore][7.875] [PathOCLBaseRenderThread::0] Size of a SampleResult: 428bytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] SampleResult buffer size: 54784Kbytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] PathInfo buffer size: 13824Kbytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] DirectLightVolumeInfo buffer size: 5632Kbytes
[LuxRays][7.875] [Device Intel(R) Iris(R) Xe Graphics OpenCLIntersect] Pixel Filter Distribution buffer size: 33Kbytes
[LuxCore][7.891] [PathOCLBaseRenderThread::0] Compiling kernels
[LuxRays][7.891] [PathOCL kernel] Compiler options: -D LUXRAYS_OPENCL_KERNEL -D SLG_OPENCL_KERNEL -D RENDER_ENGINE_PATHOCL -D PARAM_RAY_EPSILON_MIN=1e-05f -D PARAM_RAY_EPSILON_MAX=0.1f -D LUXCORE_GENERIC_OPENCL -D LUXRAYS_OPENCL_DEVICE -D LUXRAYS_OS_WINDOWS -cl-fast-relaxed-math -cl-mad-enable
[LuxRays][7.891] [PathOCL kernel] Compiling kernels
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Dade
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Re: Does LuxCoreRender v2.5 support Intel Iris Xe?

Post by Dade »

3d_render_user wrote: Sun Jun 13, 2021 7:25 pm I have a second laptop running the Intel Iris Xe card, after launching LuxCoreGui.exe, selecting PATHOCL, it stuck at "compiling kernels" forever (I waited for >1 hour)
I guess you have just verified it doesn't because the drivers don't work (i.e. "compiling kernels" is something done by the drivers).
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