- Cruise altitude lowered to y=2.0 (just above cloud top at y=1.8)
- Look direction nearly level (rd.y ~ -0.05 at horizon line)
- Stars rendered as 3D hash-grid sphere, only above horizon and
only when uDayProgress < 1 (i.e. at night). Subtle sin twinkle
keeps them from looking like static dither.
Richard Zink
ee821dd724