I wanted to be able to design several different looks to a shot and control the output of them via switch nodes. Each shot may share many elements but have certain uneak elements. Rather than copy or instance the layers I was thinking I could have switch nodes to give choice in the comp. For example two options for a reflection layer, outout to differant images. In Maya we use pre & post render comands, is there a way to do this in Nuke?
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