Here are some of the stuff I made for Stellaris.
For Stellaris I was with the project almost from the beginning, doing mockups, concepts(very rough ones :) ), paintovers, lookdev and models of ships and various objects.
Later on in the project I did all the planets. Also did paintovers over ships and lookdev.
Modeled alot of ships and objects (and made alot of colorvariationjs) and painted the background for solarsystems(unfortunately they have changed from those after release).
During the whole project I did work with coders to improve the visual pleasure of the game.