Dropped the Mountain terrain def and extended Forest to maxHeight 1.01, so the former mountain elevations generate forest instead. No terrain blocks light now; the occluder mechanism stays generic (mature trees still cast shadows) -- updated the stale "mountain" comments. Removed the unused terrain.mountain localization. Build + --check-content clean. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>