#Color Pallette Problem
3 messages in this thread
We're having a persistent problem here and would like some help and advise.
When we view an image in 3DS it looks fine. But when we put the image on the
background and render it, the colors have changed. There does not seem to be a
method to why the colors are changing. This does not happen with every image,
but only from time to time. We are also having similar problems when
rotoscoping an image. It doesn't seem to be an animation problem, but a more
general rendering problem, because when we render in the 3D Editor the problem
is there, too. We first noticed this problem when rotoscoping a fli file into a
3DS animation and thought it might be a problem involving translating
pallettes, but we have now experienced the problem also when mapping a 512×486
or 320×200 image into a 756×486 environment. Even if we render in the same
aspect ratio as the image was originally rendered in, though, we still see the
color problems. We don't know for sure that this would happen with an image
which was ORIGINALLY rendered at 756×486 (indeed we have not had a problem YET
in this) but cannot tell from our experience if resolution is the critical
factor or not. It is, for sure, confusing and keeping us from doing a couple
of projects, so we would appreciate any feedback and ideas you might be able to
provide.
[A One other item: It doesn't happen consistently on every frame, but seems to
occur all the time in some sequences but inconsistently in others. Hmmmm….
Regards- Ken and Brian
When 3DS scales an image either up or down, it uses a method of bilinear
interpolation of RGB values to make the image look as smooth as possible. The
interpolating process creates scores of new colors, and this is why you're
getting slight color changes when scaling. When you don't scale, however, the
only things that can cause color shifts (in 24-bit, of course) would be using
either fog or depth cueing. If you can send me an example of what you're
talking about, I can tell you specifically what's going on.
– G
Gary: We're not talking "slight color changes here", old friend <g>. We are
going to send you an example so you can see it. Thanks for your help.
Regards- Ken and Brian