This page provides information on supported features in V-Ray for Houdini.
These features are supported by CPU and GPU rendering in Houdini for Production and IPR modes. In Houdini, IPR on the CPU is the same as Production rendering on the CPU when using the Progressive image sampler. Note that IPR uses Brute Force for GI by default. To use Light Cache in IPR, use the Engine > Light Cache option.
GPU in Production mode does not support Distributed Rendering.
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1 – Displacement results between CPU and GPU rendering may differ slightly because of Pre-tessellation and Cache Normal settings.
2 – It is recommended to use Alembic files instead.
3 – V-Ray GPU does not support V-Ray Mesh Light textures.
4 – IPR rendering does not support BRDFAlSurface shader.
5 – GPU always uses raytraced multiple scattering for V-Ray SSS. V-Ray GPU Single Scatter is supported only in None and Simple modes. GPU also does not support the following V-Ray SSS parameters: Color Mode, Surface Offset, Prepass Rate, Prepass ID, Interpolation Accuracy, Prepass Mode, and Prepass File.
6 – IPR GPU does not support the Multiply by front diffuse option of the 2SidedMtl.
7 – IPR rendering supports motion blurred frames on integer numbers only. For example, starting the render from frame 1 will produce correct motion blur, but starting from frame 1.25 will produce incorrect motion blur.
8 – Irradiance map loaded from a file is supported in GPU only in Production rendering mode. In IPR mode, Brute Force is used as the primary and secondary engines for both GPU and CPU.
9 – The following render channels are not supported in GPU: Caustics, Coverage, Material ID, Matte Shadow, Raw Diffuse Filter, Raw GI, Raw Lighting, Raw Reflection, Raw Reflection Filter, Raw Refraction, Raw Refraction Filter, Raw Shadow, Raw Total Lighting, Reflection IOR, Reflection Glossiness, Refraction Glossiness, V-Ray Toon.
10 – Fire Lights (Fire Lights tab) and Volume Light Cache (Smoke tab) options are not supported with V-Ray GPU. For more information, refer to their relevant pages.
11 – V-Ray GPU does not support the following V-Ray CarPaint and V-Ray CarPaint 2 parameters: Trace Base Reflections, Bump Type, Trace Coat Reflections, Trace Depth, Use Environment Override, Environment Override, Environment Priority. For CarPaint it also does not support Filtering Mode and Trace Flakes Reflections.
12 – The following V-Ray Material parameters are not supported with V-Ray GPU: Roughness, Roughness Model, Opacity Mode, Dim Fall-off, Soften, Cutoff, Use Irradiance Map, Energy Preservation, Use Environment Override, Environment Override, and Environment Priority.
13 – Support through the Renderer ROP > Objects tab > Material Overrides.
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