Ok I have an interesting observation. Looks to me that blender isn't able to render out a pure color. I need to add a black background to my character, and it has to be PURE black. But when I put it into Photoshop to check, it is clearly not pure black. So I disconnected literally all my nodes, and then it defaults to black in the compositor, just to make sure its not the Alpha over node, and wouldn't you know, it's still not working.
Anyone have any ideas?
https://i.imgur.com/rzNZ7Ee.gif <-- Just showing me rendering it without nodes. (Same thing happens when I use the alpha over node.
https://i.imgur.com/i5PIpX8.gif <-- Showing in PS how its not all pure black.
I've tried turning on and off different color management options, file types, colors, etc, and nothing changes it.
This can be tested and done in ANY blender file. If you get different results, let me know.