Fewer Rays Are Faster
Adaptive Sampling Reduces Ray Counts
by Approximately 20%-50%
Why work harder than you need to? Tracing more rays increases the time it takes to render an image. Adaptive sampling is a key strategy to reduce render times by casting rays at each point until a quality threshold is reached, and then moving on. This method can reduce ray counts 20% to 50%, while producing the same quality image. This intelligent method of sampling is a simple idea, yet its implementation in RenderMan can greatly accelerate render times for almost any image.