I've been playing around with NASA's Voyager 3D model (https://science.nasa.gov/resource/voyager-3d-model/) in Blender to see if I can make a nice looking but still somewhat realistic image.

I know basically nothing about how to use Blender but I did manage to set up sunlight coming from a vaguely plausible direction, then add an approximately Uranus coloured area light behind the camera to fill in the shadows with some blue-green planetshine.

I have a vague idea of getting another custom t-shirt printed if I can come up with a render that I think would work.