Implement a simple water shader for HDR.
Largely created from the non-HDR WS3.0 water shader,
but only generating a fragment normal.
Notes:
- Water color is a constant in the shader, and set by eye
only.
- foam etc is not yet implemented.
- at very low altitudes the shader breaks down somewhat.
Use Uniform Arrays instead of Texture1D.
Use ambient/diffuse/specular/shininess material
properties consistently across all WS30 shaders.
Use consistent shading model for photoscenery vs.
landclass to minimize visual difference.
- The G-Buffer layout has been redesigned to be 96 bits per pixel. There are 24
unused bits that can be used for extra material parameters later (like
clearcoat).
- Add better debug views for the G-Buffer.
- Use octahedron normal encoding. This yields the same results as the previous
method but uses 16 bits less.
- Use rg11fb10f for the environment mapping cubemaps.
- Tweak the shadow mapping parameters and add a colored debug mode.
- Only render shadow maps for objects that inherit from model-default.eff or
model-pbr.eff instead of having a fallback Effect. Now transparent objects
should be ignored (if they are marked as such with model-transparent or
similar).
- Remove the separate occlusion texture. Now the PBR Effect expects a single
texture where R=occlusion, G=roughness and B=metallic.
