Transparent clear is definitely not a rare LEGO colour, but the pieces that come in clear tend to be ones appropriate for windows and similar constructions. Apparently disagreeing with that, Grantmasters has built a stealth Predator figure using as many translucent parts as possible, and even the odd gray elements do not stand out somehow. While we wait for LEGO to release more diverse parts in translucent colours, this figure transpires to be one of the more impressive in its scale.

Photographing LEGO in a non-LEGO environment may be viewed as cheating by some, but I believe it adds a lot to the character in this specific example.