GPU Pro 6

172 II Rendering

Bin Particles

Render Metavoxels

For each metavoxel

covered

for each particle

For each

nonempty

metavoxel

Append Particle to

Metavoxel’s Bin

Fill Metavoxel

Pre-metavoxel

Particle Bin

Propagate Light

Raymarch Metavoxel

from Eye

Figure 5.5. High-level algorithm.

may be more useful in the coming years as compute efficiency will almost certainly

continue to outpace bandwidth efficiency. Ray-marching multiple metavoxels one

at a time can be more efficient than ray-marching a larger volume. The metavoxel

localizes the sample points to a relatively small volume, potentially improving

cache hit rates and minimizing expensive off-chip bandwidth.

We fill a metavoxel ...