Le 10/07/2010 10:16, And nous fit lire :
> 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.

No problem with your english.
Have a look at the brick pattern
 http://f-lohmueller.de/pov_tut/tex/tex_550e.htm

from above, it will be what you want.
(there is other way to do it, including warp and other patterns)

Now, you can also really tile a floor (plane) with actual tiles (box),
using two loops to cover the visible area.

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