"Greg M. Johnson" wrote:
> 
> [...]
> I'd really like to have, as I said,
>     texture{
>         gradient y
>         texture_map{
>             [ n1    Texture_1]
>             [ n2    Texture_1]
>             [ n3    Texture_2]
>             [ n4    Texture_2]
>         }
>     }
> 
> Where Texture_1 contains normal{bumps}.
> 
> If I use a slope map, I assume I have the following problems:
> 1. I have to break normal out of the texture_map and instead use pigment_map
> and a normal_map: more typing .
> 2. I'm frequently a adjusting n1,n2,n3.. etc. to get the right look: more
> editing in two or three places each time, depending on how I set it up.
> 3. I don't understand a slope_map when I just want it all to be "down", or
> like in the color_map, all black.
>    Is the suggestion that I define Texture_2 as:
> 
> #declare Texture_2=texture{
>     pigment{rgb ....
>     finish{ rgb ...
>     normal {
>       gradient x
>       slope_map {
>       [0   <-1, 0>]
>       [1   <-1,0>]
>       }
>       }
>       }
> 

I'm no expert in this stuff, but i think in this case it would suffice to
declare one normal like:

    normal{
        gradient y
        normal_map{
            [ n1 bumps 0]
            [ n2 bumps 0]
            [ n3 bumps 1]
            [ n4 bumps 1]
        }
    }

And use it in all textures of the texture_map.  

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/

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