I asked this question in my Robot thread but it sunk to the second page. So in order to make the question more visible, and more accessible to a search, I’m starting this thread.
My problem is that when I tried compositing with nodes I got a border around the composited passes. I’m attaching a screenshot of my node set-up, and the resulting render.
I have “convert premul” pressed in the alpha over nodes. I found that taking the world setting out of the robot and scenery passes I could get the line to be thinner, but it was still there. And without a world setting I couldn’t use AO. I found that I could get a 3 minute render (on average) by using AO on the robot and the scenery and the floor, but rendering them seperately from each other. (This frame was rendered in 3 1/2 minutes.)
So how can I get that white border to go away? I searched on the message boards but could only find that pressing “convert premul” helped. But that doesn’t get rid of it entirely in my case.
Thanks for any help.