Frozen Cave

I used substance designer for the textures with OSL falloff to do material blending, Arnold to render AOVs which I edited in 32 and 16bit Photoshop.
I tested using 3ds Max cloth to quickly simulate the hair as shown in the video.

Pro level sketch.

Wireframe shows the displacement created in Substance doing the heavy lifting with Arnold properties.

Using Cloth to Create Quick Hair - 3ds Max Experiment

Exploration of the refraction look