🚀 go-pugleaf

Michael B. Johnson writes
> Charles Fletcher writes
> 
> > 
> > 	How can you get high resolution images out of the NeXT?
> Well, first I'll  
> assume you're either 3D competent (i.e. you understand the 3DKit and can list  
3  
> reasons why what Dave Springer did is hard) or you're using one of the 3D  
apps  
> that are beginning to appear.  My personal favorite so far is 3D Reality  
> (blatant plug) from Stone Design.  Either way, let's say you've modeled  
> something, have applied a shader, and have now saved it out to a RIB file.  A  
> RIB file is the RenderMan equivalent of a PS file in PostScript - it's an  
ASCII  
> file you hand to RenderMan (the same way you have an ASCII file which you  
send  
> to a PostScript interpreter) and ask it to give you back bits.  
> 

To (briefly) follow up my followup, I thought this deserved another line or two  
of explanation:

In Postscript, you would never edit the ASCII PS file to stick in resolution  
information because the resolution is implicit in the device you are sending  
the PS file to for it to be rendered on.  With RenderMan, you are (in the end)  
always sending it to prman, the PhotoRealistic Renderer, and therefore need  
(want) to instruct it what resolution to render at.  Actually, if you are a  
hardcore production person, there is one (at least) area in PostScript where  
this would be an issue: lines per inch.  Depending on the resolution of your  
final output device, you might hack the PS file to have a different screen  
value.  Actually, the same might go for flatness of strokes.  Hmmm...  anyway,  
the analogy of PS/2D RIB/3D holds up pretty well in explaining this stuff, so I  
hope this has been useful...


--

-->  Michael B. Johnson
-->  MIT Media Lab      --  Computer Graphics & Animation Group
-->  (617) 253-0663     --  wave@media-lab.media.mit.edu
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