Overview
You can decorate your base with custom images with this guide!
Uploading your custom image
First, You need find “screenshots” folder in your save file. If you don’t know how to find this folder, you can try this method: Right click on the game in Steam Library and click ‘Browse Local Files’ Open “SNAppData” folder then “SavedGames” folder. Now find your save file here. They are in order of when you created them. Once find your save file open “screenshots” folder. If you can’t see “screenshots” folder, you need the take a picture in the game by pressing “F11” then save and close your game or you can create new folder named “screenshots” Drag and drop image you want into the “screenshots” folder. For the photo to fit in the Picture Frame properly, it must have a 16:9 aspect ratio. (1920×1080 resolution, for example)
Remember!
Only .jpg format are supported and the game must be restarted. The blueprint for the Picture Frame can be scanned at Omega Lab and Phi Robotics Center. It can be crafted with the Habitat Builder. 
