- 12 rune billboard sprites (Elder Futhark glyphs) in a slow-orbiting
ring at radius 7.0, y=1.5, around the center platform
- Alternating cyan (#00ffcc) / magenta (#ff44ff) additive-blend glow
rendered via canvas + shadowBlur onto CanvasTexture sprites
- Runes orbit at 0.08 rad/s with per-rune vertical float phase offsets
- Faint orbit-indicator torus marks the ring height
- Opacity pulses gently on each rune using individual phase offsets
Fixes#110
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>