The terminology's always been a bit vague: technically "Ray casting" is a more accurate way to describe one ray being sent out and intersected with something (i

The terminology's always been a bit vague: technically "Ray casting" is a more accurate way to describe one ray being sent out and intersected with something (i.e. from camera/eye into the scene). The "tracing" part used to imply Whitted, but then things like PRMan introduced "raytraced shadows" as an alternative to shadow maps, and it took on a dual-use meaning...