This slide talks about the "ray packet" technique in ray tracing: you trace a group of nearby rays together, instead of one by one.
The benefit being that nearby rays are expected to hit the same object, and therefore share a lot of computation. Then the computation can probably be efficiently performed by SIMD and have good cache utilization.
This slide talks about the "ray packet" technique in ray tracing: you trace a group of nearby rays together, instead of one by one.
The benefit being that nearby rays are expected to hit the same object, and therefore share a lot of computation. Then the computation can probably be efficiently performed by SIMD and have good cache utilization.