Kinda like the decal tool in TF2, you can change the texture of your ball in BallRace, make a shirt, or change the floors and walls in your condo, etc. by selecting a file from your computer or via the internet.
If this is what you are referring to, then it is already a planned feature.
I know you can make posters, but what I mean is you can put images on different stuff, like shirts, with the same tool.
In that case, there has already been a suggestion similar to yours.
That would defeat the purpose of already designed shirts, as you could just copy them.
I feel like we’ve just touched the tip of the iceberg in terms of what we can do with the canvas feature. You can bet we’ll be playing around with the loading internet images feature more and seeing what fits right for the game.