Jaap wrote:
> 
> is there some way to do this inside pov ? (i.e. using
> the same black and white image as used for switching
> between the 2 textures)
> is it possible to get direct acces to the pixel data?
> (so i can write my own blurring functions)
> 

Can be done directly, if very slowly in inside POV.
To get direct access to the pixel data of your map, you can use (untested):

#local Pix = function {
   pattern {
     image_pattern { png "bump.png" }
   }
}

image is mapped in function from x=0 y=0 to x=1 y=1, so you would get 
pixel <50,100> with
#local Value = Pix ( 50.5/mapwidth , 100.5/mapheight, 0 );

Simpler is to blur the function using another function. A simple blurred 
function using the above defined 'Pix' function would look like this:
#local Blurred = function {(Pix(x+.1,y,z) + Pix(x-.1,y,z))/2}

Apply whatever blurring function you like, then add layers, then blur 
again, use a sin function, whatever until you get what you want.

When done, render with:
pigment { function { Blurred(x,y,z) } }
or:
normal { function { Blurred(x,y,z) } }

If you've got the patience for that kind of render time, then I would 
suggest at least trying the object pattern (with a text object) as a 
function instead of using your map. Slower, but the results would likely 
be better.

  -Shay

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