We also now pre-expose our lighting before writing to the HDR buffers.
This solves some precision issues and prevents the Sun from producing
infinite values.
- New atmosphering rendering technique based on my own work.
- Attempt to fix some remaining transparency issues.
- Use a luminance histogram for auto exposure.
- Add support for clustered shading.
- Add WS 2.0 shaders.
- Add 3D cloud shaders.
- Add orthoscenery support.
Talking with Emilian about this commit, we came to the conclusion we don't want share uniform between .eff file
This reverts commit 91a6a27f32ee5f79e1d7e0d4570e879a902de58f.
