This was a paid project I did a few years ago. It was a huge honor to work on artwork for games made by the legendary Jeff Minter, and to see it physically released by AtariAge. Any Atari fans out there?
I first produced a series of thumbnails for the client to comment and choose from. After they made a decision on two ideas that they liked, I did some somewhat larger color thumbnails in Krita. After they chose between these two ideas, I then moved into working on the final piece. I did the base artwork in Blender, and then did a paint over in Krita.
I also did some 3D pre-visualization of the final product in Blender, including stills and video for marketing.
I did record most of this process. Unfortunately most of the work in Krita for the box art is lost, but I do have a time lapse of the label artwork that includes both Blender and Krita below.