Drawing 70 million cubes with 40 fps!

One day, my friend told me that unity3d is not good enough for voxel games with a large number of cubes, and I answered him - "hold my beer” ...


Area size: 512x512x512 (135 millions) and half of this is filled with cubes (perlin noise). So total number of cubes almost 70M.
Total vertices 20k, tris 10k.
GPU: gtx 1050
Ram usage: ~1,2GB

 

How did you do this

 

I remembered this topic.

 

Do you know the answer of this question?

 

setting position of each by passing a Material PropertyBlock with SetMatrixArray?
The problem is if each instance is a 6-face cube there is potential for massive over-draw, so not sure this is fast or preferable to an optimised mesh with culled faces and entire cubes, unless things changing every frame

The stats on the screens suggest rendering each tower of cubes, rather than every single one

 

I FOUND THIS ANSWER FROM HIS YOUTUBE VIDEO COMMENT

i've used a sime-transparent planes (cutout aplha shader) for render each type of orthogonal faces. For example, all forward faces of cubes with same z coordianes are rendering via one big quad so i have 512 big quads (with transparent cutout shaders) for each side type. And total quads count is 6*512 = 3072. data stored in 3d textures but i think that's not relly good way for volume rendering (need pretty much resources for alpha-testing). I'm probably will make it using raymarching

But I did not understand how he drew it using shader