Poked Studio explains how he post-processes his images using render layers and Photoshop.
I often get asked how I get extra colour, vibrancy and texture into my 3D work.
Often 3D renders can come out a bit flat and boring. The key to vibrancy is comping and mixing lots of renders ( passes ) in a program such a photoshop, that allows you to blend your various renders layers.
For this tutorial I'm using Blender and Photoshop, but the same principles can be applied to other 3D and comping software.