Describe the bug
The Blocks added by NuclearCraft Extra Ingot Blocks seem to be using the default ContentTweaker block model which doesn't cull invisible block faces. This leads to a performance drop when large amounts of these blocks are placed in the world and prevents seeing through them in spectator mode.

Expected behavior
Blocks to cull invisible faces.

Screenshots
A wall of Extreme Alloy Blocks from the addon, and a wall of custom ContentTweaker blocks.

View from inside the custom blocks.

View from inside the extreme alloy.

Addon version:
NCEIB-Overhaul-v1.8.1

Additional context
This can be fixed by changing the auto generated blockstates to point at custom model files like the model used for the screenshot, attached below.
venus_surface.zip

Interesting, thanks for bringing this issue to my attention, didn't know it could happen 😅