I designed the conduit-related blocks and entities. It’s an animated blocks with several different parts. I designed the base, cage, and eyes. As it’s made of nautilus shells I tried giving it a pearlescent/iridescent aspect. I used semi-reflective metal and scale-like structures to achieve that goal.
Here’s what it looks like, I used Continuum 2.1 Alpha and Kappa 2.0 shaders :