I just spent two hours making this happen in Illustrator.
It’s the safe version of this. If you click on this image, or on any of the other ones in this post, you’ll see a higher-res copy. I am not sure I recommend doing this.
I can now use these flat-color Graphic Styles to draw a whole bunch of assorted shapes in something akin to three-point perspective. Which would involve following this grid that I built in Illustrator before building the previous two images.
And hell, let me try a quick test drawing. Just some basic shapes following these perspective guidelines.
Alt-drag twelve swatches around and…
Yep. This is gonna work. I’ve got a lot of drawing to do, and this won’t work for every single part of the image – but I should be able to lay down a lot of it pretty quickly like this. I’ll end up with tons of hatching that precisely lines up with the perspective I’ve drawn the shapes in. I had to do some funky stuff to set all of this up and part of me thinks I should write it up, but I also spent two hours in front of the computer and think I need to run around some.
Illustrator has a three-point perspective ruler mode. I’m really not sure I’m going to bother with it; I feel like the time I’d spend figuring out how it works is going to be really close to the amount of time I’d spend just doing it the “hard” way. I learnt how to do hardcore perspective years ago, and I’ve forgotten most of it, but I think I remember enough to fake this. Should be fun!