In August 2023, I used my back yard telescope and a DSLR to take a series of long exposures of Galaxy M101, to catch a supernova and stacked and processed the photos to make this shot as a negative greyscale image. It's not the greatest shot, too much light pollution where I am. But I like it. So now it's a 3D printable model, made from the astrophoto with Hueforge. The Supernova is the left half of the black double spot above and to the right of the core of the galaxy.

Print at 100% infill with a layer height of 0.08mm with a base layer of 0.2mm

Start with White
At layer #10 (0.92mm) swap to Light Gray
At layer #17 (1.48mm) swap to Dark Gray
At layer #30 (2.52mm) swap to Black for the rest.