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BNAO

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Features

Requirements

BNAO runs on regular (as in, not compute) shaders and thus does not demand much from your GPU. However, it does require support for floating point and shadow map format render textures. To check if this is supported on your platform, use these functions:
SystemInfo.SupportsRenderTextureFormat(RenderTextureFormat.ARGBFloat);
SystemInfo.SupportsRenderTextureFormat(RenderTextureFormat.Shadowmap);

What are bent normals?

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Bent normal maps store the direction of least occlusion (in other words, the direction in which the most ambient light is coming from) in a texture.
They can be used to occlude cubemap reflections based on the view direction in a much more realistic way than just multiplying with an ambient occlusion term. They can also be used to get an ambient color value which more closesly resembles a ray traced result.
For details on how to implement these effects in your own shader, see the file "Shader Implementation Example.txt".

Can I specify a max distance for the ambient occlusion?

No. The baker uses depth textures (similar to shadow mapping) to determine ray intersections, which makes it impossible to bias the result based on distance.

The normals convertor outputs weird results!

Make sure your texture settings for the input texture are correct. For TS normals just set "Texture Type" to "Normal Map". For OS normals, leave it at "Default" but uncheck "sRGB (Color Texture)".