(L) [2014/12/02] [tby shiqiu1105] [About ray differentials of primary rays] Wayback!Hi,
I am writing to ask about the ray differentials for primary rays if they don't hit anything.
I still need the differentials info to sample environment map, but how should the differentials be calculated?
Thanks
(L) [2014/12/04] [tby shiqiu1105] [About ray differentials of primary rays] Wayback!Maybe, not sure how the math works.
I think it should depend on the fov, film resolution.