Only 3D print settings I tweaked are for the ironing and then I've adjusted the models a bit for color, depending on the filament I have on hand. Here are some more:
I didn't design any of these, but I did find out these are made with a software called Hueforge and I intend to try to learn it and make my own models. I think the look pretty neat and I'm excited to experiment with making my own designs.
Nice prints! I managed to print this (using an image I found off of Google) last time I was messing around with Hueforge:
I wish I could give helpful some tips, but I mostly just followed the official YouTube tutorials and messed with the sliders until I got the colors matching the flag. There's also been a lot of updates since, so hopefully it's easier to do more isolated color selection.