When used, all pixels will receive a sampling rate of at least Camera (AA), but no more than Max Camera (AA). It allows dedicating a greater number of camera samples (and thus also a greater amount of render time) to the pixels that show a greater variation in their sample values. More details can be found in the Alembic documentation.Īrnold now has the capability of adapting the sampling rate of each pixel when Adaptive Sampling is enabled in the Render Settings. Maya native GPU Cache nodes are now being exported as an alembic procedural and expose in an Arnold section several parameters, as well as a list allowing to inspect the Alembic file and isolate a given sub-object. Trace sets in ambient occlusion shader: aiAmbientOcclusion now includes a Trace Set parameter to specify which objects are included or excluded.Īlembic support (gpuCache): Arnold now natively supports Alembic files.Added Bump in aiPassthrough shader: This allows for the assignment of a normal or bump map that affects the entire network of shaders it is connected to.Per-light group shadow mattes: aiShadowMatte has a new Light Group parameter that when enabled makes the shader sensitive only to a given light group.This allows reducing hair noise without increasing the global AA settings. Extra Samples parameter in aiStandardHair shader: allows using additional GI samples on a per-shader basis.ID AOVs in aiStandardSurface and aiStandardHair: Both these shaders now support ID AOVs, which are useful for creating mattes.The maximum number of layers in these shaders is limited to 8. New Layer shaders: The newly added aiLayerFloat, aiLayerShader and aiLayerRgba shaders can be used to mix float values, surface shaders (closures) and textures respectively.
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