Is it possible to place more than one image_map into a height_field. I 
have two tga images I would like to overlay onto a height_field created 
from a DEM (imported into POVRay as a tga image).

The two images make up different parts of the overall image, i.e., land 
and water. Each image_map is brought in as a pigment object.

I have tried applying to pigments (image_maps) to the same height_field, 
but POVRay only draws the second pigment. I have also tried using 
texture layers to do this. That didn't work as well.

Does anybody have any clues that might help?

Thanks?

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"Michael Cooper" <coo### [at] cartonet> wrote in message
news:3FC### [at] cartonet...
>
> Does anybody have any clues that might help?

The following would layer to image maps, one on top of the other. The top layer
would be 50% transparent.

box{
  0, 1
  texture{
    pigment{
      image_map {
        gif "under.gif"
        map_type 0
        interpolate 2
      }
    }
  }

  texture{
    pigment{
      image_map {
        gif "over.gif"
        map_type 0
        interpolate 2
        transmit all 0.5
      }
    }
  }

}

If you wanted just parts of the top image to be transparent, then you can
specify a colour index, rather than 'all' - e.g.:

transmit 0, 0.5 // filters color index 0 by 50%

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Tom Melly wrote:

> 
> transmit 0, 0.5 // filters color index 0 by 50%
> 

Excellent, I worked!! Thanks for the help.

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