[Saphereye]

What this changes and why

1. Save blocks above ground for custom "buildings". This allows rendering it on top of LODs
2. Adds support for lights blocks to emit their respective rgb even in LODs.

How I tested it

Structures with very small render distance to show how the LODs look + lighting

All blocks in the debug world are rendered fine with LODs

Video demo

Screencast_20261107_201507.webm

AI use

Yes :(

• Adding a zoom mod temporarily + git
• Maths

Checks

• I read AI_POLICY.md and can explain this change without asking an AI
• I ran the game and the tests