Am 01.03.2011 09:22, schrieb hearing:
>> You can add another layer.
>> For the added layer, you can use a bozo or leopard pattern unevenly
>> scalled. That pattern will be mostly transparent with some darker
>> filtering areas.
>> leopard will give a more regular pattern, while bozo have a random look.
>> Additionaly, you can apply a cylindrical warp to that layer.
>>
>> You can also experiment with some other patterns.
>
> i tried already, but bozo and leopard are defined to appear in every direction
> similar. I am looking for a "bozo" like layer that only appear in one direction.
> In my case, the radial direction. Any suggestions?

Try the "planar warp"; it is intended to stretch a 2D slice of a texture 
into infinity; then, apply cylindrical warp to that.

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