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Lance Birch wrote:
> "Tim Cook" <z99### [at] bellsouth net> wrote in message
> news:42117769$1@news.povray.org...
>> Having looked up what shaders are, the question springs to mind:
>> why do you need a plugin to work with the texture{} or material{}
>> code, which afaik can do what these other applications' shaders do?
>
> Well, shaders allow greater control over what can be done... they
> allow you to implement new patterns and surface interactions that
> aren't currently supported as inbuilt patterns and finishes, etc.
>
> For example, you might want to create a special "matte" shader that
> "punches through" other objects to the background.
Or a pigment that changes colour depending on the angle between the surface
normal and the viewer.
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