here's the situation: i am using alpha transparency on an object, let's say a cube. there is a large sphere behind the cube that is flagged not to render (both via maya's render stats and MR's render flags on the transform node). however, when i render, the sphere shows up where the alpha transparency of the cube is in both the render and the alpha channel produced. this does not happen in Maya software rendering, and not in another raytracing plug in i've been test driving, Turtle.
this happens regardless of the use of final gather and photons. playing with raytracing settings (trace depth and so on) doesn't seem to work...
is there some sort of special MR shader i need to be using? i figure i should be using some sort of equivalent of a glass shader, but it doesn't make sense to me that an object flagged not to render would become visible because of the alpha.
hai