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From: mark@calvin..westford.ccur.com (Mark Thompson)
Newsgroups: comp.sys.amiga.graphics
Subject: Re: Imagine Surface definitions
Message-ID: <61752@masscomp.westford.ccur.com>
Date: 25 Feb 91 15:56:02 GMT
References: <44649@nigel.ee.udel.edu> <1991Feb24.023354.18018@ddsw1.MCS.COM>
Sender: news@masscomp.westford.ccur.com
Reply-To: mark@calvin.westford.ccur.com (Mark Thompson)
Organization: Concurrent Computer Corp. Westford MA.
Lines: 33

In article <1991Feb24.023354.18018@ddsw1.MCS.COM> zane@ddsw1.MCS.COM (Sameer Parekh) writes:
>
>	Does anyone know how to simulate glass using the Video Toaster's
>3D Lightwave module?

No problem. For a colorless clear glass, try somethingh like this:

Color: 230, 230, 240 (only a slight blue tint)
Diffuse: 70%
Specular: 100%
Highlight Size: High
Color Highlight: Off
Transparency: 95%
Reflectivity: 30% (optional if you have an image or background to reflect)
Edges: Opaque 
Smoothing: On

By making the surface nearly completely transparent but making the edges
opaque, it gives the appearance of a glass object rather than an object
that is just fading out. Also note that when creating glass objects, you
must pay attention to interior polygons that might otherwise not be 
rendered because of back-face culling. For example, if you create a glass
sphere, you must create it with 2 sided polygons so that the back of the
sphere is visible through the transparent front.

Hope this helps.
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