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Cinema 4d rendering
Hi guys im having some problem with rendering here. Actually in my project I found a way to sought out my problem. So referring to the

image 1 A and B are two objects and the camera is in its position. So in my case I want to render as the image 2

I mean to say that is my actual camera view, where Object B is covering some of the area of object A. To solve my problem I want to render in such a way so that rendered image only contains the object A not the area covered by the object B. The area covered by the object B should be Alpha. Thank you