I have a voxel raytracer that is generating some weird shadows and I want to understand what is the source of the problem. The image is voxelized, resulting in: I then generate Hard shadows from the voxels creating the following image: Up to this point everything works as expected. The voxel...

Assume the screen is axis aligned with origin at 0 and there is absolutely no view transformation. in other words we will simply try to project the model onto the screen plane following perspective. Say our FOV is 60 degrees, so the focal length is tan(30). I am given a vertex $V=(x,y,z)$ is ...