If anyone is looking for a damage free Hue indoor motion sensor corner mout, check this out!
That guy also does Ecobee sensor mounts (I have a few). And some other kinds of mounts. I wanted a damage free way to mount the hue sensor and asked him if he would be interested in taking a swing at it. He did and here is the final product!
If it's an outside corner, you can use the included magnet to mount the Hue motion sensor to stick to the metal drywall corner bead. I have several mounted this way.