EDIT: 16:9 Aspect Ratio
The renders below here are the initial ones.
Composite
Raw
Clay
Vintage (attempt)
A 2 week project of an idea I had what the underwater ruins of the Mechonis from Xenoblade Chronicles would look like.
I know, red light gets completely absorbed at deep depths but that would mean giving up the effect (and hey, we are artists).
Everything done in Blender (the only add-on used was Random Flow), except the additional compositing which was done in Lightroom.