In your screenshot, you've clicked into the command prompt, which enables Select mode, freezing the game. Make sure that doesn't happen, if it does, press Enter to get out of it again.
emiliya in an sense that's true but imagine just slapping the picture on camo file the entire gun would have zero two face everywhere and my vision for the ump skin wouldn't allow it so i took the weapon skin and worked on it little by little, pictures like the ahegao that i use for a custom camo work because that the purpose of it to look like a mashup, this one was not the case
know I am commenting on something two years old, but is there a reason that the preview doesn't work? I know its not game breaking, but I didn't know it was working until I got in game, the create a class camo was showing the default instead of yours