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Date: Thu, 27 Jul 1995 11:54:14 -0400 (EDT)
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Subject: Re: Lens Burns.
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On Mon, 24 Jul 1995, Adrian Onsen wrote:

> > >What the heck are Lens Burns? I've heard of lens flares, but  never
> >  >lens burns

> I don't even think it's posible to do in lightwave... But I hope I'm
> wrong on this one.


It all depends on how you want the lens burn to occur...if you want it to
happen as you pan the camera past a stationary light, then it will be
rather difficult.  If you want the light to fly past the camera and leave
a burned trail on the camera's lens, then this is pretty easy...simply
save the moving light's motion path and apply it to other lights or
(better yet) single point polygons (particles) with the motion path
offset by one frame for each particle.  Give each particle a different
surface name and use diminishing levels of luminosity to make it look as
if the lens burn fades as time goes on.  Also, make the particle size at
least Medium or Large in size, although you may need to use more than one
particle at each offset motion path to get the proper size.  Last, but
not least, turn on Motion Blur for particles...this will make the
particles leave a streak behind that will blend with the next particle
behind it.

I used this technique to create a writing effect where words were
hand-written on the screen and stayed there.  Looked adequate.

                                     -David Warner
                                      Event Horizon Graphics


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