Le_Forgeron <jgr### [at] freefr> wrote:

> I do not know what you are trying to achieve, but it looks like you want
> to change the color of the plane afterhand... maybe a look at the
> texture/pigment & pattern sections in the documentation might help you.
>
> Povray has no concept of dynamic shader and it looks like you are used
> to them.

Thank you. I just want to draw the gap between the tiles. But I think they are
something like this:
_______________       _______________________________       _________________
               |_____|                               |_____|
This one is the plane with black line:
http://picasaweb.google.com/lh/photo/MrYRcPOAXjg3pmqDBol66Q?feat=directlink

This picture is what I am trying. Notice that the width of the line decrease
while it is far frome the camera:
http://picasaweb.google.com/lh/photo/WG3qxXgmTB4jyEFNoeLBvQ?feat=directlink

My English is poor, excuse me.

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