Hi! I love creating custom decors, and i have submitted one, but it ended up very pixelated… can anyone give me some tips :)?

I followed the official guide but it was still very pixelated. Do you guys recommend making them on a 1280x1000, or 640x500?

I’ll link mine, (it only works on kind pose) but you can see it’s pixelated! Any criticism welcome!

https://www.lioden.com/custom_decors.php?id=9166

(Accidentally posted this on my side account, it’s submitted by my main account)