Recently I'm developing a Monte-Carlo path tracer. To measure my tracer's performance, I decided to implement a simple mechanism to count how many rays can it trace in a second. Then here comes the problem, there are two ways to define a single ray:
A complete ray, i.e., starting from camera and bouncing around the scene until it terminates.
The ray originated from each intersection point.
Although many people use "Rays per Second" to measure ray/path tracer's performance, how they recognize "rays" is unclear to me. Perhaps anybody knows?