I'm doing one of those boring "car on an infinite white plane" renders and I have a problem. I have a full sphere, mapped with a HDR image, and a plane. I don't want the plane to reflect in the car, so I turn of trace in the mr settings of that object. The sphere is marked not visible.
The problem is the sphere shows through the windows of the car. It's logical that the plane doesn't show, becuse it isn't traced, but the sphere? Can I exclude the plane from reflecting in some other way? It seems maya's settings for that is not working.
I had the same problems in a recent project. there was a character in a glass bowl and the hdri sphere was visible in the areas that where refracted. i never found any other solution than rendering a mask of the chatacter and remove the refracted sphere in post. hopefully future versions will improve on this. the hdrsphere needs to be traced for finalgather. I might have missed something though. tight deadlines arent quite the ideal situation for experimenting