Re: posterized textures on High Impact

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Todd Weybrew (waycool++at++Zx7.engr.sgi.com)
Mon, 12 Feb 1996 16:24:23 -0800

On Feb 12, 5:54pm, Dwight Meglan wrote:
> Subject: posterized textures on High Impact
> We have a problem with our textures. The application that we are writing
> for the High Impact is now posterizing some of our textures. On our Onyx
> with an RE2 they look great. Our guess is that there are less than 24bit
> planes of color on the High Impact and that we have exceeded the ability of
> the colormap algorithms to compensate gracefully.

correctamundo on your guess... if running High Impact at 1280x1024 double
buffered, you get 2 36bit buffers... one for Z and stencil and one which gives
you a 16 bit front and back buffer. this lets you do 4444 or 5551 RGBA pixels.
 options are: 1) go to 1024x768 to get a third 36bit buffer so you can do true
32 bit double buffer, or 2) upgrade to Maximum Impact to get the additional
frame buffer memory required to do true 32 bit double buffered at 1280x1024.
 BTW, this will also give you a second Geometry engine and double your fill
rate too 8^).

>
> The current display is quite ugly so we must come up with a work around.
> Can anyone suggest a method to work around this ? BTW, we have a lot of
> textures but are well within the 4MB limit of the TRAMs.
>
> Thanks in advance,
>
> --dwight
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Dwight Meglan, PhD | Developers of complete surgery simulation
> Engineering Coordinator | training systems and surgery simulation
> High Techsplanations, Inc. | creation software tools
> 6001 Montrose Rd., Suite 902 |
> Rockville, MD 20852-4874 | "Witty, yet erudite saying goes here..."
> 301 984 3706 x38 |
> 301 984 2104 : FAX |
> dwight++at++ht.com | http://www.ht.com
>
>
>-- End of excerpt from Dwight Meglan

-- 
Todd Weybrew				waycool++at++engr.sgi.com
Illusioneer - ISD Applied Engr		(415) 933-6854
Silicon Graphics			(415) 967-9541 FAX

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