I don't think any of the image formats were ever intended to be beyond
the 256 color threshold when used for filter/transmit due to the indexed
palette coupling with color_map indices, ie. integers only. Am I right?


Ken wrote:
> 
> Ken wrote:
> >  I just checked the Docs on this and found a clause in the use of the
> > filter/transmit all function that I never had quite noticed before.
> > These particular bitmap modifiers only work with .png, .gif, and .iff
> > image types. It is not supported for .tga image files.
> 
>    Yo,
> 
>    As a follow up to my last message I did a little more digging into
>  what is and what is not compatable with the transmit/filter compatibility
>  with image maps and found a rather dissapointing limitation. I have a
>  .gif file that was working quite well with the flt/trans modifiers and
>  converted it to a 16m color 24 bit .png image file. When I attempted to
>  render the same scene I was using with the .gif file the filter and
>  transmit values I had assigned were completely ignored. I coverted the
>  original .gif file again to .png but this time to 8 bit and 256 colors
>  and it rendered with similar performance as seen using the .gif image.
> 
>    I am going to try it again with the .tga file format when this render
>  I am working on finishes. I have a hunch that if I save the .tga to 256
>  colors and 8 bit it will work as expected.
> 
>    Anyone know why these functions are behaving this way and is it the way
>  they should be working ?
> 
>  --
>  Ken Tyler
> 
>  mailto://tylereng@pacbell.net

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