Hi SkyTree thanks for your answer.
So you treat the puzzle as any other part of the scene (with its triggers, hotspots, interactions, etc) and just show it on top of everything else when needed. Is this right? Would sound like a good sound to me!
hi Chris, thanks a lot for your answer.
I followed those steps indeed, and still I can't get the hotspot highlighted. I'm sure it's a simple thing I may be missing here, so I'm attaching here the settings both for the Hotspot and the Sprite which is…