home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!portal!cup.portal.com!EcoDev
- From: EcoDev@cup.portal.com (Eco - Development)
- Newsgroups: comp.sys.amiga.graphics
- Subject: Re: Banding Still Imminent in AGA 256,000 color mode!
- Message-ID: <71985@cup.portal.com>
- Date: Fri, 18 Dec 92 18:35:16 PST
- Organization: The Portal System (TM)
- References: <1992Dec17.144504.9669@ac.dal.ca>
- Lines: 42
-
- >
- >
- >
- >
- > I just compared 256 color modes with AGA HAM8 256K+ colors, and I still see
- >banding in the 256,000 color mode, why?? With all those colors
- >shouldn't the banding disappear?
- >
- > I did this by rendering a REAL 3D pic at 640x400 by 24bit and then converting
- >it to 256 colors and 256K+ colors and compared how different they looked.
- >
- > Albeit, the banding diminished in the 256,000+ color mode, but was not
- >totally gone. Maybe it was that ARTDept 2.1 does not have proper conversion
- >to HAM8 24 bit mode yet. Any advice on this one is much appreciated!!!
- >
-
- Try rendering in 12 bits of color. The problem is ADPRO's, supersampling
- of your image data. If you give ADPRO or _most_ graphics programs the
- opportunity to chose from too many colors, the result will show the deficiencys
- in their color selection algorithms. i.e. Give it less initial colors to
- chose from and it will do a better job choosing the colors for your end
- result. Rendering in less resolution will give ADPRO less colors to
- chose from, or at least to try and recreate and it will do a better
- job recreating them. (maybe thats clearer, I'm not awake yet). This is
- a trick most smart game companies use to get better on screen graphics.
- Also try rendering at the same resolution as your final image is going to
- be and at twice that resolution. You have to find the 'sweet spot' for
- graphics conversion program you are going to use, the one that allows it
- to make the best images.
-
- Bottom line. 24 bits of color is plenty, unlike what you hear from other
- sources. The human eye cannot distiguish more than 2,000,000 colors.
- Try different resolutions and bit depths and dithering techniques and
- you will get better results.
-
-
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % Brick Eksten /\ %
- % beksten@ucqais.cba.uc.edu \/ DisplayMaker! an App Builder %
- % EcoDev@cup.portal.com /\ %
- % Eco Development 606-371-9690 \/ (just ask) %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-