I used to do that as well, I also do it in any game that uses Unreal engine since it's a simple bmp. But with those I would just use mspaint for my masterpieces.

Nice one. Hey, do you develop in unreal?

I did back with UE2 and 3. Nothing with UE4 though, and my feelings on Epic have changed greatly over the years.

Let's just say that being associated with Tencent is a major turn off for me.