Has someone opened any pictures/postcards from gta v in photoeditor and used black light, burn tool, changed brightness/contrast etc.? I have noticed that when I play, the game is full of hidden paintings, layered images(I don't know what they are called:) Even the postcards have something in them. I tried to make them pop out, but I'm not satisfied. In game you can use snapmatic, layers etc. and when the time and light is right you can see a lot. But I want to see more, more clearly and understand better what do I see!
Not very good examples: https://imgur.com/a/9utjJ