Okay so... I was rereading Secret history and got to the point where fuzz gives the light allegory. I now have a few questions.
1. Why does metal only glow on Scadrial? I have never seen it glow in the cognitive realm on Roshar. Why is this different?
2. In secret history, the ground is made of mist. On Roshar, it is made of beads/spheres. Why does it change?
3. In Fuzz's allegory it implies that there could be multiple layers of the cognitive realm, going closer and closer to the 'sun', or spiritual realm, and also being quicker and quicker to travel through. Am I understanding this wrong?