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VRay 3.0 Ward Shader Bug - Possibly energy conservation
Maya 2015 VRay 3.0. Using Ward shader in a scene lit with VRay lights and HDRI. On Ward shaders with substantial reflectivity, unlocking highlight and reflection glossiness and leaving highlight glossiness at or very close to 1.0 produces massive NaNs that contaminate entire buckets. See attached image.
adding a bumpmap seems to eliminate or reduce the issue; the Shaderball swatch seems to show the NaNs; setting highlight glossiness to less than 1.0 reduces the issue to the point of generating only "regular" NaNs; setting color mapping to "subpixel filtering" and clamping at some lower overbright value, e.g. 8, eliminates those NaNs.
Render below. Have example scene but won't let me upload.
adding a bumpmap seems to eliminate or reduce the issue; the Shaderball swatch seems to show the NaNs; setting highlight glossiness to less than 1.0 reduces the issue to the point of generating only "regular" NaNs; setting color mapping to "subpixel filtering" and clamping at some lower overbright value, e.g. 8, eliminates those NaNs.
Render below. Have example scene but won't let me upload.
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