Gilles Tran wrote:
> 
> Here are two :
> - use a black fog
> - use a gradient texture (I have used this one to fake focal blur in
> post-process)

For focal blur you should use a spherical pattern translated at the 
camera position and not a gradient.  With small camera angles this does 
not matter much but it is also easier to set up (you don't need to worry 
about camera view direction).

Christoph

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