Compositing, maybe?

I've been creating a master file for all of my scenes. Something I can properly access, that contains all the textures, effects, etc. It's been a bit more time consuming than I thought, but now that I have everything all together, I now need to make tweaks to make them exist cohesively.

Here's a little concept. The left is what I'm aiming for, the right is what my render actually looks like.