So I've got two 3D planes next to each other occupying the same Z space but off set in X so there is no overlapping. I've got a camera & light. By animating the light in Z, I get strange vertical lines that appear over one or both of the red planes. Disabling either plane gets rid of the issue. The light is casting shadow and disabling it fixes it but then I lose out on shadows. I'm using the classic 3d renderer and still get the same issue at 8 bit, 16 or float. Increasing the comp's shadow resolution makes the lines thinner but still apparent. Any ideas?
For anyone who wants to take a look, a simple scene file is here http://bit.ly/1CMX0xq
