Angus Dorbie (dorbie++at++bitch.reading.sgi.com)
Mon, 2 Oct 1995 19:38:41 +0100
This shouldn't happed with intensity maps so your greyscale images are
probably 3 or 4 component instead of 1. The image quality will improve
if you use 1 component for intensities, and avoid 4 component where alpha
information isn't required.
Try editing the texture properties in Multigen (select a texture from the
palette and press = then select the internal format you desire) hopefully
the loader will recognise this but it may depend on the version you are
linking to, and what else your application is doing.
Your INDY doesn't support the internal format and so doesn't exhibit the
problem.
On Oct 2, 2:28pm, Hansong Zhang wrote:
> Subject: Incorrect Texture Mapping on Reality Engine 2
> Hello everybody,
>
> I had a strange problem when displaying a model (MultiGen .flt file)
> on an Onyx with Reality Engine 2 graphics, using Perfjoy or Perfly.
> On the texture mapped walls there're visible color bands, but the
> texture map is greyscale (though I can't say the rgb values are
> the same for any pixel). For some faces the mapping is largely
> correct but with color bands, for others the color is not correct
> at all.
>
> I'm using very small textures (e.g. 16x16). I tried to display
> the same model with the same software on an Indy (with no hardware
> texture support) and the result is correct. I mapped the texuture
> to a square using OpenGL and it works O.K. So the problem should
> be somewhere between Perfly and the graphics hardware.
>
> Any suggestion will be appeciated!
>
> Hansong
>
>
> Hansong Zhang
> Grad student
> UNC-Chapel Hill
>
>-- End of excerpt from Hansong Zhang
-- Angus Dorbie, Silicon Graphics Ltd, UK dorbie++at++reading.sgi.com
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