How to render high quality transparent images from models?

Im currently stumped on how to extract a big clump of decals and import them into one image.
(example image of what I want to remove the background from)


It feels impossible to do something like this, unfortunately. Do you guys have any solutions to this, other than viewport frames?
I feel like cutting the image into parts, since roblox downscales the image to 1024x1024.

Also, I got a transparent online thing to cut the image for me, but it doesn’t look great.


Any solutions? Thanks!

Maybe use a sprite sheet. change the tiling and offsets and stuffs. AS to how to get high-quality transparent images? I don’t think you can get higher quality than what viewport frames provide. maybe screenshot the object and then remove the background (using another background remover, or do it manually) (do them like 10 at a time maybe?)