This painting is based on a model I crafted ten years ago. Photos of the model were used as guides for the geometry, the rest was painted with Procreate on an iPad3 with a Wacom Bamboo stylus. I did a few others with this spacecraft:

Space Exploration Cruiser Near Stellar Event

Space Cruiser preparing to receive a returning exploration spacecraft

And check out the model that I built of this spaceship, the I.N.S.S. MacArthur.