It was made using my custom build of Disco Diffusion, photo-manipulation and digital drawing through Gimp and Inkscape, and post editing/composition in darktable.
So I didn't wait, and took all of those baseballs right into Disco Diffusion for a spin!
I quickly noticed that it wouldn't do it, there's simply not enough information on a baseball to create details with the help of AI. Disco Diffusion needed a little help from yours truly, before it all.
So, I got some results I like, took them into Gimp, find a few brushes online, cable images, AC images and wires, and started photobashing, adding them at certain location (AC on the neck, cables around the bigger bones, wires on the face), started adding some colours as well, as it was quite... plain white/yellow, really, with nothing else.
After some time photobashing and drawing, it was time to cut all that mess into pieces (Top left, top right, bottom right, bottom left, center top, center, center bottom, face, and back) and feed all those pieces back to my hungry Disco Diffusion.
After HOURS of rendering time, I took the pieces back into Gimp for assembling, then into Inkscape for vectorizing and coloring, few final touches and last photobashing as well.
Post-editing and composition was entirely done in darktable (which, btw, is SO much superior to Lightroom, and free, so give it a spin), and I was done!