Describe the bug:
This is a double bug report, first is that metal glass uses incorrect rendering(?), doesn't let light go through it, similar to vanilla ice.

Second is this crash:
crash-2020-05-10_07.32.02-client.txt

To Reproduce the crash above:

1. Put down sublim chamber.
2. Put 1 haderoth block, and then 64 coal blocks
3. Put 64 haderoth blocks
4. Crash

P.S. The world remains bricked

Expected behavior:

glass should let light trough and the game shouldn't crash when using the chamber

from the 4.0 dev test build