Phase 5 adds world-anchored building shadows + a stable cloud layer (both toggleable) (sun/stars stay world-anchored; fog helps distance readability).sky dome stability: world-anchored sun + stars (press N night, M day).
Skins are built as SVG materials so we can swap/extend later.
Flight Mode
Use the controls to move freely around buildings. This is the foundation for later phases (weapons, missions, ship/deck ops).