home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Light ROM 4
/
Light ROM 4 - Disc 1.iso
/
text
/
maillist
/
1994
/
july94.doc
/
000446_owner-lightwave-l _Wed Jul 27 12:13:12 1994.msg
< prev
next >
Wrap
Internet Message Format
|
1995-03-23
|
3KB
Return-Path: <owner-lightwave-l>
Received: by mail.netcom.com (8.6.8.1/Netcom) id LAA23501; Wed, 27 Jul 1994 11:41:48 -0700
Received: from iia.org by mail.netcom.com (8.6.8.1/Netcom) id LAA23459; Wed, 27 Jul 1994 11:41:39 -0700
Received: by iia.org id AA19823 (5.65c/IDA-1.4.4 for lightwave-l@netcom.com); Wed, 27 Jul 1994 14:40:56 -0400
Date: Wed, 27 Jul 1994 14:40:55 -0400 (EDT)
From: Perry Harovas <harovap@mary.iia.org>
Subject: Re: Shifting Motions
To: lightwave-l@netcom.com
Cc: lightwave-l@netcom.com
In-Reply-To: <9407252319.3.25294@cup.portal.com>
Message-Id: <Pine.3.89.9407271455.A18720-0100000@mary>
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: owner-lightwave-l@netcom.com
Precedence: list
Reply-To: lightwave-l@netcom.com
On Mon, 25 Jul 1994 Jeric@cup.portal.com wrote:
> Perry Horavas writes:
>
> >
> >On Sun, 17 Jul 1994, HURTT CHRISTOPHER MICHAEL wrote:
> >
> >> Another great feature would be "Shadow Casting Only" toggle
> >> for objects. An object would cast a shadow, but not be renered or show
> >> up in the Alpha channel. Good for when using multile layers and compositing.
> >
> >Again, I TOTALLY agree. I have had to do this _many_ times, and again,
> >hack to the rescue!
>
>
> ???? Really? Why? Please expand on why this is such a neat thing
> and is so useful, cuz I can't really think of a regular application for it.
>
> Thanks!
>
Well, I'm reading and replying to this at siggraph, and the `internet
police seem to be hovering near me (maybe I'm on too long), so I will
make this brief. I have needed to use this (hopefully future) feature to
do special effects where I wanted to cast a shadow, but not have the
object visible. This was to create a "shadow" character that moved
through the scene. The only way around this, was doing it in two layers,
and compositing (using and object and a front projection image map to
recieve the shadows). The reason that this is not the best way around
this is (in addition to the extra time needed to set up an render the
composite scene), the lighting of the object that will cast shadows has
to be fudged to allow the object to be off camera (so that it is not
_visible_). This caused some shadow reality interaction problems that
made it hard to make this scene realistic. If this "shadow only" thing
were an option, I would have been much more productive (and happier).
Sorry, but I need to move on now (so MUCH to see!!!!!!!!!) :-)
See everyone Friday when I'm back!
-Perry Harovas