Hierarchy; less is more is - design is layout, do research about the rule of thirds and visual hierarchy to better your composition. It's much more than colors and how cool something looks but also the placement of other objects around the focal element and how they contrast each other.
Another piece before I go to bed, but this is kind of like CG art of the Ruins from Undertale? It was for an animation project (currently unfinished lol)
Diorama I drew for my thesis project which I used as a background in two previous posts! It took around 100 hours to draw. Here are some close ups