LF: texture/shader used for the metal
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That looks to me like another mesh inside the body, wrapping around the metals (or it is the robotic mesh itself made any way opaque, hard to tell by that very image) and got poiyomi's transparency setting used properly, which involves proper alpha mask mapping, multilayer layer shading and with light-blue emission enabled on it.
Example:
This one includes a few more settings, making it look this way, but base is the stuff I've mentioned to make it see-through like this. -
@blapanda i'm not technically sure. it gives the jiggling effect like its jelly (the avi is called synth, found in avi search world, it might be easier to see it while actually wearing it). the actual arm asset itself has nothing transparent regarding the metal (pic of the asset on my personal)