A sparkle effect was added but I think even the sparkle effect is tough to spot. So I guess we should make it go even more "TAADAAA!"
Please no "TAADAAA!" stuff.
Im having trouble enough to resign myself to those blasting trumpets that explode!! everytime i try to go invisible. I dont need more of that... especially playing late at night...
Hey, maybe take those trumpets and use those as a "hint" that your character spotted something?

Actually i would prefer, and i think it would look much better in the game, setting, lore and atmosphere wise - to have a bit more non extreme effects for things like that. So, no sparkling or trumpets but maybe, a hovering smoke-like sign of some kind, with some understated but visible additional small effect?
Maybe an effect like a small static cloud? (different color of course)