Shadow Algorithms Data Miner

3.7. V oxels 95

the hardware render pass because the hardware render pass may not capture po-

tentially important subpixel regions closer to the camera view that the ray tracer

would have caught otherwise (without this optimization step).

RaytracingontheGPUhasbecomefeasibleduetotheavailabilityofadvanced

fragment shaders [488, 319]. Many of the techniques used for GPU ray tracing

have been adopted from CPU techniques relating to voxel traversal [198, 526, 160]

with a large focus on ray tracing acceleration relating to early ray termination, fast

voxel traversal, and ecient space leaping, usually applying some variants of sparse

octrees[490,70,112,1