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Date: Mon, 15 May 1995 18:08:21 -0400 (EDT)
From: Joe Angell <[e-mail]>
Subject: Re: Transparency
To: Carl Andrew Johnson <[e-mail]>
Cc: Lightwave <[e-mail]>
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> I'm trying to create a Wall of Flames. I created a pretty good texture
> using Kai's Power tools. The difficult part is getting both the edges and
> portions of the interior to be transparent. I can create a transpaency
> map where the edges are partially transparent, but I can't animate it
> because the top edge has to remain partially transparent.
>
> I guess to be a little more descritive, I have a flat plane that will be
> my wall. It's got a fire texture moving up in the Y axis. I have
> transparency map that is also moving up the axis, but at a different
> rate. If I make the left and right side transparent, can't make the top
> transparent and still move it up along the y axis.
>
> Suggestions?


Here ya go...

Go into Modeller.  Find the location of the BOTTOM of the fire wall, and
the height of the wall.  The Bottom # will be the texture center, and the
height'll be used to figure out the falloff.

Go to Layout and find your firewall surface.
Set the transparency of your SURFACE (not the texture) to 100%.

Go into the Trans. Texture Map (the T). Go to the Texture Center, and punch
in the Y coord you got in modeler (the BOTTOM) into the Y in the Texture
Center.

The whole purpose of that thing above was for the Texture Falloff.  Since
falloffs always go AWAY from the center, you would want the center at the
bottom.

Go to texture falloff.  figure out what percent of 1 meter the height of
your wall is ( 2 meters is 200%, 1/2 meter is 50%, ect.) and punch that
into the Y falloff (as a PERCENT, like .5 for 50%).  Hit F9.

What this SHOULD do is make a nice, gently gradient from completly solid
at the bottom to 100% transparent at the top (the texture falls off to no
effect, so the 100% surface transpanrency kicks in.  If the surface trans.
was 0%, the map would disolve into a solid surface.)

A quick note:  You may have to select Negative Image for the map to look
correct with the 100% transparent surface.

Hope this helps...

-- Joe

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