Visuality project Godray + Bloom update

- Godray fog volume slightly thickened: mistiness 0.70, density 0.022.
- Godray output multiplier slightly reduced to keep the thicker fog controlled.
- Bloom now uses a soft-threshold bright-pass instead of blurring the whole frame.
- Bloom pyramid now emphasizes the compact glow core and reduces the far halo.
- Bloom strength default raised slightly to 0.60.
- Fixed exposure and cave/night lighting logic from the previous build were left untouched.
