Hi, I’m learning the Compositor and I completely hit a wall.
I’m trying to add a white outline to a rendered object. I’m using the Dilate/Erode filter to expand the alpha. It works fine when the image color is black. But when I change the color to white, the whole comp is flooded white, even though I haven’t changed anything about the alpha.
Here is an example scene: https://www.dropbox.com/s/b58u5gfgangvtri/compositor%20white%20outline.blend?dl=0
So the comp only respects my alpha when I’m adding a black color. Why?
Is the Image channel overriding the alpha channel somehow? Feel like I’m misunderstanding something fundamental about the Compositor.
Thanks for any advice,