"Mr. Art" wrote:
> 
> Hi all,
>     I am having trouble getting an image map to have transpatent colors
> in it.
> I have rendered a scene of text as "NutWords.png" and used it to wrap
> around a glass globe.
>  ex: #declare Test =pigment{image_map{png "NutWords.png" transmit 0,.5}}
> 
> ( Only the parts that give me a problem are left as I test this.)
>  When I try to render, I get an error message like this:
> #declare Test =pigment{image_map{png "NutWords.png" transmit 0
> <----ERROR
> F:\AUserScn\test.pov:11; error: Keyword 'transmit' cannot be used non
> color-mapped image.
> 
> When I looked in the help file to find the right format, I find this:
> 
> The Filter and Transmit Bitmap Modifiers
> 
> To make all or part of an image map transparent you can specify filter
> and/or transmit
> values for the color palette/registers of PNG, GIF or IFF pictures (at
> least for the modes
> that use palettes). You can do this by adding the keyword filter or
> transmit following
> the filename. The keyword is followed by two numbers. The first number
> is the palette
> number value and the second is the amount of transparency.
> 
> What am I missing? I saved this part of the project for last and now I
> am stuck.
> Thanks for any help.
> 
> Mr. Art

  First thing that you should know is that for transmit or filter to work
with image mapping you need an image saved to 8 bit 256 colors or it won't
work. Higher color depths will be ignored and the feature will not work.
Once you get past that the format outlined in the docs should work for you.

-- 
Ken Tyler

See my 850+ Povray and 3D Rendering and Raytracing Links at:
http://home.pacbell.net/tylereng/index.html

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