[rescue] Re: SGI Onyx4 - uses ATI graphics chips (sigh)

[Joshua D. Boyd]

On Fri, Aug 22, 2003 at 08:14:57PM -0700, Lionel Peterson wrote:

> I would test that theory by having a field of one color (say all red,
> in my example FF 00 00, for Red, Green and Blue), and in that filed,
> draw a solid image of, say, a circle with a color that is one bit off
> (say FE 00 00) - if you can see the image, you can resolve the
> difference - if you can't, you can't.

In my experience, something like

F0F0F0 versus F1F0F0 would be likely to be more visible.

Also, trying to increment by one degree colors that aren't primary will
quickly display problems that can't easily be side stepped in 24 bit
color other than by dithering.  Shades of grey, for instance.