Openfile dialog, choose a photo and let it be a texture standalone game

Hi so there are some games that let people to use their own pictures as textures of the 3d models, like box faces for example. How can I implement this?
There a few threads like this and none is answered so I guess my question won’t be answered either. But I will bump if till the victory

Halp! Please halp!

@Dudester01, You have to at least make an attempt before anyone can try to help. State your specific goals, then state what you have attempted to do, finally explain what went. It isn’t anything personal. It’s just hard to answer vague requests.

I used this.