It is unfortunate that Valve can not add this feature to the creators of the modifications. Some developers provide such an opportunity in the in-game tool, in This War of Mene, this option was not available.

Today I wanted to update my collection of characters with new photos. 11 bit studios, I understand that you are busy people, but if you have such an opportunity, please add this option.

What is it about: https://i.imgur.com/XCXDclx.png