QUOTE (KCKitsune @ Oct 21 2012, 07:23 PM)

I'm thinking if you have the color match your skin tone, change the surface texture to have the same level of give that a normal limb has, and make it generate enough heat to mimic your regular limb, that you would be hard pressed to tell the difference. Sure some slot uses Radar on your limb and it's going to be obvious, but just looking at it... not so much.
Well, color of the arm matching the owner's skin tone, that doesn't seem so difficult. Changing the skin texture and emulating bodily heat is a lot less easy, though, I'd say.
Faking surface texture, body heat, possibly bodily hair and anatomical correctness (see some anatomical parts like muscles moving while moving said arm) - all that seems pretty much everything that makes synthetic arms seem so realistic.
Especially the joints might be pretty difficult to conceal, as they probably look mechanical and not so lively on the outside.
Long sleeves and gloves might do the trick, though. As long as you cyberlimb is not pitch black. Heck, pale white might do if your skin tone somehow remotely matches that.
Plus, cyberlimbs are not illegal. People may give you a strange look, but that's mostly all.