Spire is a low level Vulkan voxel renderer.
See Documentation for documentation, building instructions, etc.
The entire world can be remeshed and uploaded to the GPU in 150ms on an i7-12700F.
While Spire supports up to 2^32-1 voxel types, only grass and dirt have been configured which is why the world does not look like Minecraft.
Above is a screenshot of a spider model being rendered by Spire. It takes up 8x4x8 chunks where each chunk is 64^3 voxels.
spider.obj was taken from https://github.com/assimp/assimp/tree/master/test/models/OBJ and then converted to .xyzrgb using https://github.com/eisenwave/obj2voxel (scaled up 4x) and then converted into .sprc via Tooling/XYZRGBConverter which Spire is capable of rendering.
46 MB RAM Used
59 MB VRAM Used
0.148ms/frame (6700 FPS)