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Troubleshoot grainy or flickering shadow edges (raytraced shadows)
Troubleshoot shadows
Troubleshoot Dmap resolution changes don’t update in IPR
User Guide
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Rendering and Render Setup
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Lighting
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Basics of Lighting
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Troubleshoot shadows
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Troubleshoot staircase of dark triangles on surface (raytraced shadows)
Do either of the following:
Increase
Curvature Tolerance
for the surface.
Increase
U Divisions Factor
and
V Divisions Factor
for the surface (to the lowest values that produce acceptable results).