Increasing size?

Helloooooo everyone,
I have a little question - can I increase size of the texture? By that I mean, lets say default is 1024x1024, I make it 2048x2048? Same question and for guns and for camos. Will it work ingame?

i do belive not, because the hex and stuff. but derp shoud know better than me. ask him

Nope. If you increase the size, you would increase the size of the file too, which would mean it would not work on steam, and probably not alter either.