I have taken and modified bits of code from BruceKnowsHow's Octray program, related to voxelization. The entire voxelization was implemented by Spheya however. Thanks!
- Refraction in composite.fsh. Downside is that we have to get rid of the pixels we calculated before, wherever refraction needs to happen
- In the GI step, sample the skybox, for nice soft shadows (sun has a size) and better sun contribution
- Invalidate old GI samples based on depth to remove lots of artifacting
- Implement a proper lighting model
- Implement reflection (and possibly refraction)
- Implement different block types
- Denoise the GI samples stored
- Compose all passes correctly, so entities and such are still visible
Voxelization is done in the shadow pass.
Raytracing is done in the deferred pass.
In both the voxelization as well as the raytracing itself, there is mention of a variable called LOD.
Essentially, it jumps up a LOD when there's no voxels in the current "voxel" checked.
This means that, the bigger the LOD, the bigger area is evaluated. The way it's voxelized makes this possible.
If there is a voxel inside the volume checked, it will go down a LOD and trace further.