v0.5: Blue sky gradient, acid rework, iron, phase transitions, shadows (experimental)
- Blue sky gradient background (y<600 blue, 600-700 gradient, y>700 dark)
- Acid system: health-based damage via acid_resist, not instant delete
- New material: Iron (ID 16) - acid-proof, heat-conductive, reflective
- Phase transitions: Iron→Lava (150°C), Sand→Glass (200°C), Glass→Lava (160°C)
- Stone no longer melts (lava containment)
- Heat transfer formula improved (divisor 255→200)
- Iron metallic texture with bright highlights + light reflection
- Shadow system attempted (grid-based, per-pixel) - reverted, needs rethink
- Updated AGENTS.md for next session
nico
a2700df292