Greg Edwards wrote:
> On Thu, 20 Feb 2003 17:43:09 +0100, Sebastian H. wrote:
> 
> 
>>Daniel Nilsson wrote:
>>
>>>This is the blue channel of the image with improved contrast.
>>>I think it looks like concrete...
>>>...and better then the color version.
>>>The cool thing is that you can choose if you want the light from the top or
>>>the bottom by selecting the blue or the red channel.
>>>
>>>--
>>>Daniel Nilsson
>>>
>>>
>>>
>>
>>It looks great!
>>But I don't get it.
>>An image is flat and this surface expands in three dimensions.
>>How????
>>
>>Sebastian H.
> 
> 
> It's an isosurface. The object is based on a 3d noise formula. No height 
> fields involved. (I assume that's what you're puzzled about)

Yes I thought you used a image_map pigment as function but that's clear now.

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