I've recently moved up to Toolbag 4 and love the ray tracing capabilities, but keep getting these horrible shadow artefacts only when ray tracing is enabled. It's as if the lighting is looking at a hard-edged version of the model to light rather than taking into account the normals properly with the textures.
With ray tracing:
• I've checked the tangent space for the model. it's set to 'Marmoset'
. The model was made in Maya, and changing it to that makes no difference. No other option there fixes it.
• Disabling 'Cast Shadows' on the mesh fixes it, but then means it wont cast shadows on itself.
• Latest video drivers.
Any help would be much appreciated!