Go to your Windows search bar and type in "%localappdata%" and open the folder.

Open the folders: "Sega" > "LikeADragon8" > "Steam" > "album".

In here you will find the photos you took with the camera, keep this folder open.

Open the game and take a random screenshot, we will be replacing it with the camera one.

After that, fully close the game and Steam itself.

Go to your Steam folder wherever you have it installed, and open the "userdata" folder.

You will find several screenshots aswell a few folders with numbers (they are your Steam ID3 of all accounts that have been logged in that PC). If you have several folders you can check your ID using this (https://www.steamidfinder.com).

After opening the correct account folder, search "2072450" and should come to it, which is Infinite Wealth's games ID and where all screenshots are saved. Open it and "screenshots".

Copy paste the camera photos from the Step 1 folder into here and into the "thumbnails" folder, and then copy the name of the random screenshot you took, delete this screenshot and change the name to your camera photo for it. Do this aswell on the thumbnail folder.

(Note: I assume Steam screenshots need to be .jpg files, like the rest of those in the folder, even that the camera photos auto save as .jpg aswell, if anything doesn't work check it and do a convertion.)

Now we should be settle. Open Steam and go View > Screenshots, and it should be there for you to upload, in large image.

Hope this helps, and enjoy taking good photos!