POV-Ray : Newsgroups : povray.binaries.images : Test Rendering : The Vases (3) : Re: Test Rendering : The Vases (3) Server Time
4 Nov 2024 21:25:20 EST (-0500)
  Re: Test Rendering : The Vases (3)  
From: Fabian BRAU
Date: 10 Aug 2000 05:00:49
Message: <39926F2A.FE36C44@umh.ac.be>
Hello All,

Thanks for your comment.

For the textures, I use a "new" (at least for me) method
which mix procedurial and image_map. In this way, if
you don't make mistake :), you cannot see repeating pattern.
The adventage is that you aren't obliged to use huge image_map.
This doesn't work with all image_map, it depend on the kind of
pattern on the image, but it work great for most.

You want the method? 
It seems I can hear yes ;).

This is very simple and I suppose I am not the first to
experiment it. Many variant are possible and perhaps some
of you will improve it (this is why I give you the method ;)).

You make a layer texture:

1) on the first layer you put the image_map (well corrected
   in photoshop etc...), the normal (bump_map which is just 
   the same picture but in grey scale and with much more
   contrast) and the finish.

2) on the second layer you make a pigment map, you can use
   what you want as pattern with turbulence or not (but if
   there is turbulence, you need reset children, thank Nathan!). 
   Here I use two entries. For the first entry you put a simple 
   color rgbt 1.0. For the second entry you put the same image 
   map, with normal (bump_map). And finally you add the finish.

I think it's all :). Pretty simple.

In the beginning, I though about that to make some roughcast-like
texture, with some part which are gone etc... But it works for
other kind of texture too :).

Some of the image_map are found on internet, the others are 
photos made by me. Simply go to the link part of the povray site
to have good links to really good textures. Some are seamless,
others need to be processed (if you need explication, this
will come on the GenOrb site http://www.genorb.be.tf. But I am
sure that with Altavista you can find this information on 
the web). But in all case you need to improve their histogram into
photoshop (thanks Gilles).

Fabian.


> 
> The bottom of the picture is not good so just look
> the upper part :).
> 
> Fabian.
> 
>   ------------------------------------------------------------------------
>  [Image]


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