- only sss, remove other ao implementations
- tweak params
- make sss a separate renderable

- proper per-group transparency with wboit off
- fixed outlines with transparent backgound

- cleanup of renderer and draw pass

- better handle outlines in orthographic mode
- remove unused code
- increase default outline scale to 2

- restrict ssao to viewport bounds
- only downscale ssao buffer (not upscale)
- avoid zero camera radius/radiusMax to allow camera movements in empty scenes and to avoid ssao artifacts

- no default exports
- no named tuples

- better distingush objects close to far plane from background
- draw outlines last to be cleaner
- allow larger AO radius

- AO defaults: darker, larger radius
- handle transparent bg for outlines & AO
- handle fog for AO
- fix fog for outlines
- fragmentDepth for fog (instead of camera distance)
- webgl1 compat

- simpler viewport handling
- shared render targets
- stereo camera fixes & improvements

- separate pass to check against depth texture
- support precalculated normals
- shading in volume mode
- fixed orthographic projection
- fixed skewed grid (David)
- step size prop
- isosurface picking (needs more work)