Jaap wrote:

> thanks,
> 
> i was not looking for a normal blur (like in my code above), i
> was going to use a non-linear finction (like 1/x) whith the distance
> to the nearest edge as input. (see image in yesterdays post)
> 
> but maybe i can get a similar result by adding several function together.
> 
> jaap.

Just take the result of the linear blur and apply your non-linear 
function to it.

like this:
#declare NonLinear =
function { 1 / Blur(x,y,z) }
or:
function { sin ( Blur(x,y,z) ) }
or:
function { sin ( Blur(x,y,z)*2*pi + pi/2 ) - 1 }

Whatever you like.

  -Shay

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