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- Newsgroups: comp.sys.next.misc
- Path: sparky!uunet!lissie!bbum
- From: bbum@object.com (Bill Bumgarner)
- Subject: Re: RenderMan-High resolution rendering?
- Message-ID: <1992Nov12.170651.620@object.com>
- Sender: bbum@object.com
- Organization: Objective Technologies,Inc.
- References: <1992Nov12.052457.27074@news.media.mit.edu>
- Date: Thu, 12 Nov 92 17:06:51 GMT
- Lines: 50
-
- In article <1992Nov12.052457.27074@news.media.mit.edu> wave@waits.media.mit.edu
- (Michael B. Johnson) writes:
- > Michael B. Johnson writes
- > > Charles Fletcher writes
- > >
- << ... bunch of useful goo deleted ... >>
- > hope this has been useful...
-
- As a further tip, if you notice a lot of jaggy aliasing along the edgies of
- various objects in your scene, a ShadingRate below 1 will often help...
-
- But not always; I have found that grabbing the PixelSamples line and modifying
- it from 1 1 to 2 2 works wonders for getting rid of jaggies; if i'm not
- mistaken, 2 2 means that each pixel will be oversampled 4x and the result will
- be anti-aliased. IE: To do a single large frame of the animation in the info
- panel of SmartFields, I put the following at the top of one of the rib files
- (removing the original commands from within the file):
-
- Display "BigFrame.tiff" "file" "rgba"
- Format 800 800 1.000000
- ShadingRate .25
- PixelSamples 2 2
-
- ## rest of rib removed....
-
- When rendering large DPI images, what you are effectively doing is changing the
- Format to some multiple of the original images size.... For example, over the
- summer we were rendering the word "NeXT" for NeXTWorld extra (you may remember
- it-- it was on the cover with a fade between wood and blue_marble) at 400dpi
- for the printers... the original image was under 500x300 (about 2.5" by 1.5" or
- so), but when rendered at 400 dpi, it was 1900 x 1000 (!!!!) which took a hell
- of a long time to render...
-
- I'm not sure if the low-level rendering engine is bright enough to write the
- correct numbers into the resulting TIFF file's DPI fields... probably not.
-
-
- > --
- >
- > --> Michael B. Johnson
- > --> MIT Media Lab -- Computer Graphics & Animation Group
- > --> (617) 253-0663 -- wave@media-lab.media.mit.edu
- > --> NeXT Mail accepted at wave@nordine.media.mit.edu
-
-
- --
- Bill Bumgarner <bbum@object.com>
- Objective Technologies, Inc.
- --
- Bill Bumgarner <bbum@object.com>
-