- **Stars**:
- Implemented procedural stars using hash-based noise.
- Added UI controls for Star Density and Enable/Disable.
- Tuned star brightness (reduced intensity) and refined twilight fade timing (visible during nautical twilight).
- Improved compositing with aggressive cloud occlusion and non-linear fade.
- Added star reflections to water, strictly masked to the horizon line.
- **Heat Shimmer**:
- Fixed horizon artifacts by decoupling shimmer from atmospheric density (Mie scattering).
- Implemented FBM-based view distortion for heat waves.
- Added sun elevation fade (shimmer fades out as sun rises > 30°).
- **Water**:
- Implemented Finite Difference normal calculation as a high-quality fallback when "Derivative Trick" is disabled.
- Added "Octaves" parameter to control wave detail.
- Refined reflection logic to handle stars and sun disk properly.
- **System**:
- Updated [simulated_skybox.mat](cci:7://file:///Users/mathias/sources/git/filament/docs_src/src_raw/wip/sky/simulated_skybox.mat:0:0-0:0) with new material parameters (`starControl`, `waterControl`).
- Refactored JS bindings in [SimulatedSkybox.js](cci:7://file:///Users/mathias/sources/git/filament/docs_src/src_raw/wip/sky/SimulatedSkybox.js:0:0-0:0) and organized `main.js` UI into logical folders.
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