3DS – non-deterministic?
25-Jun-95 09:55:01
Sb: #177146-3DS – non-deterministic?
Fm: David Gould 100424,2533
To: Jim Spoto 102113,2260
<<Why are large, solid areas of color (for instance a solid rendering
background) dithered in patchy areas and with different patterns for different
frames of a dithered flic.>>
Firstly the all the colours for all the frames of the animation amount to 256.
So this doesn't leave you with many colours for the details. The problem you
mentioned can either be caused by an incorrect palette or the simple fact that
you'll always get banding when using such a small palette for a gradient such
as you described.
<<To demonstrate, try rendering a simple animation over a solid background with
dither on. Once rendered, you'll notice that in odd angular areas, the solid
color is dithered and "creeps" from frame to frame, even though there is no
real motion in the solid color.>>
As Gary mentioned a few days ago the dithering uses a little bit of random that
no two frames will dither the same. This normally isn't a problem since
normally everything is moving in an animation.
DaviD "just a spoon full of randomness makes the medicine go down" GouID