I ran blacked-out housings/shrouds/projector cutoff shields (doesn't affect light output) and corners. Dechroming shrouds and corners are easy; soak them in Purple Power or purple Zep degreaser, it takes about 10-15 mins of soaking to strip the shrouds and a few hours to do OEM corners, but aftermarket corners took about the same time to strip as the shrouds. Zep is a stronger formulation, I've seen videos of people dechroming OEM corners/signals after minutes of soaking.
E46 style shroud, cutoff shields painted black (AKA passive demon eye) on a G5-R projector
MH1 7.0 projectors with the same shrouds and black passive demon eyes. Scuffed the housings and painted with either Krylon or Rustoleum satin black
I have another retrofit in the works but in chrome, the shrouds I've selected (haven't seen anyone use them on a 3rd-gen) won't make it look too "bug eyed"