Sadly that’s the only method I’ve ever heard of.

Personally I just take pictures with my camera (an actual camera, not a phone camera.) The flash is hard to work with, and no flash tends to make them all blue and very blurry. Sometimes it turns out okay, most of the times it doesn’t…
My avatar is one of the pictures I took that actually turned out quite nicely. It still didn’t pick up all the purples that were on the screen, but I thought it still looked pretty :3