Global illumination with Voxel Cone Tracing in fully dynamic scenes using a 3D clipmap to support huge areas around the camera while maintaining a low memory footprint.
There are visible circle artifacts on the sphere in the Sponza scene.
Here is the video with varying shininess: video
At first, I thought that this artifact comes from the method itself due to the discretization of the scene and directional sampling, not the implementation bug. But I couldn't figure it out the direct cause and couldn't find anything related to this problem from the web as well.
While migrating to Ubuntu, I found that there is a big difference at GI rendering result as you can see from the two images below. I used the same code and configurations, hardware and no error appears in the output.
I'm still trying to figure out what's the causes of this problem. Any comments would be helpful.