I have never spent so long on a masking pattern in my life jesus fuck. It would have been impossible to do without this
https://www.super-hobby.co.uk/products/Narzedzie-do-wycinania-digital-camo-1-5-3.html I tried to cut squares and do the checkerboard manually first but it looked wonky as hell, so I ended up scoring the checkerboard with a nail on the template and carefully cutting the mask with a scalpel after moving it to the model and it worked pretty well