Decided to post this video of my Voxel RT. Still very WIP (video is a bit old though) but I'm pretty happy with current results. 

Still I need to do some massive optimizations because that's like 8x8 regions rendering and I want 64+

Specs: 

* 3.125 cm voxel size. These are packed into 25cm blocks which are 8x8x8 voxels each
* Material Pallete table
* Possible blocks are stored in a 3D Texture Atlas (4096 possible blocks for now, 128³), each texel is a material id
* 25cm blocks as main world voxel
* World subdivided in regions and chunks. 
* Each chunk is 16x16x16 blocks (128x128x128 voxels) (mimics minecraft sub-chunk)
* Each region is 4x64x4 chunks  (mimics minecraft chunk)
* Two stage rendering: First pass returns two textures: depth and material ID, second one does light and color.
* Stored in GPU using octrees passed in SSBO for tracing chunks, and then a chunk table in another SSBO.
* Two-phase DDAs: First to trace to block, after got block ID, trace \_inside\_ a block at texture atlas.
* Physics are computed in 25cm grid instead 3.215 (so any non empty voxel is considered solid 25x25x25cm)



What you see in the video: discolored chunks are in LOD mode (Will not trace inside a block, but use block "most common material"), World size and region loading fixed at origin to test LOD.



What I currently have working: Bevy's Avian 3D with TNUA (can walk in the world), region spawner / despawner and GPU updates. Can run \~400 FPS on a RTX 3060TI, memory lookup bottlenecked when increasing regions. Still need to optimize that part \^\^

Also open to suggestions. I will probably do a more SVO like approach in the future which might help with memory lookups.



PS: I'm not a render programmer and thats my first time doing that, and I don't want anyone that "just wants to make a voxel game" suffer that 😂 - So I will be releasing the render for bevy eventually.

My voxel RT game made in bevy