
I was showing a friend Carrara's GI and physics through a short animation. During the 10 second video, for about 1 second, there is a white block where there should be some shadow (see frame 2).
Here are the render settings:
Shadows : On
Object Accuracy : 1 pixels
Shadow Accuracy : 2 pixels
Ray Depth : 8
Enable Indirect Lighting : checked
Use Interpolation : checked
Photon count : 10000
Lighting Quality : Good
Accuracy : 4 pixels
I'm hoping it's just matter of cranking up the settings to a higher quality. Not critical now but just wanted to know for future reference.