Re: [Openexr-devel] Application requirements for Blender's OpenEXR output

[Bob Friesenhahn]

On Mon, 14 Mar 2005, Gernot Ziegler wrote:
> .) RGB vs. RGBA: Are space requirements an issue, or is it ok to always
> output RGBA ? Do you need a gray setting ?

A more important criteria than space is what a reader/viewer will do 
if an alpha channel is present.  If an alpha channel is present, the 
reader is likely to do many things it would otherwise not do, 
therefore wasting time and possibly obtaining somewhat different 
results.  So I recommend not outputting an alpha channel unless it is 
expected to be used.

Bob
======================================
Bob Friesenhahn
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GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/