I’ve been trying to deeply understand VRay recently, and I came across a specific topic that I didn’t quite get, which is how sampling rays are calculated, all I get so far is in an AA-method like the common “Adaptive Subdiv” it initially put 4 sampling rays, then as the pixel gets sampled over and over, the sampling rays increases by exponent of 4, However. in DMC AA-subdiv and scene subdivs where it uses the term “subdivs” in to represent their sampling, I get that 1 subdiv equals 10 sampling rays (e.g 16 light subdiv = 160 shadow rays), but I came across another topic where it says that subivs is the number of the subdivs set to 2 exponent (8 light subdivs = 64 shadow rays).

I know it sounds stupid to ask for such subtle detail that wouldn’t make a difference anyways as CG artist, but I’m really curious about the whole sampling thing, and if someone can explain how sampling is calculated exactly I’d greatly appreciate it.