Comment by WoodenChair

If you want to make MacPaint drawings that incorporate your modern photos then I make a program for that. Retro Dither on the Mac App Store dithers and exports photos to MacPaint (wrapped in MacBinary for transport):

https://oaksnow.com/retrodither/

There’s also a chapter in my new book explaining how to write the same program in Python including Atkinson dithering, the MacPaint file format and MacBinary. You can get the code for free and do the conversions yourself without Retro Dither here:

https://github.com/davecom/ComputerScienceFromScratch

The book is here:

https://nostarch.com/computer-science-from-scratch