If you want to put someone you know on a cube, a ball or any other form in 3D, Photoshop provides a filter to do it easily.
Open your photo in this instance Sankukai, and change the size of the work area (double the height and width) from the image menu.
Then go to the menu Filter / Render / 3D Transform.
Choose from three pre-defined shapes and apply it on your image
In the options (see blue arrow), you can uncheck the Show the background, leaving only the shape you want. Use the two arrows to change and move the 3D shape and surrounded by two buttons on the image to view the 3D image and move in space.
Note: We left the empty space around the image, if you want to use a screen larger than your base image.