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From: ewright@convex.com (Edward V. Wright)
Newsgroups: comp.graphics
Subject: Re: Image Aesthetics on Mac
Message-ID: <ewright.660955162@convex.convex.com>
Date: 11 Dec 90 22:39:22 GMT
References: <1990Dec11.161150.5356@eagle.lerc.nasa.gov>
Sender: usenet@convex.com
Lines: 14

In <1990Dec11.161150.5356@eagle.lerc.nasa.gov> hamid@lims01.lerc.nasa.gov (HAMID SAMADANI) writes:


>	My guess is that the pastel quality is achieved because the strokes 
>	of color when applied to the image are opaque, that is a single 
>	brush of color hides what may be underneath, like a thick pastel 
>	pen stroke.  With watercolor or oil paints the translucent quality 
>	of the mixed color adds an additional element to the image. 

Color QuickDraw supports copy modes that allow a program to blend
the source and destination colors instead of simply replacing the
destination, if desired.