> Does anyone know how to accomplish the effect of dispersing light into a
> spectrum as it passes through glass?
> I'm going to have to do it with a large number of surfaces/bevels, so I'd
> rather avoid "cheating" with hidden lights and colored gels, etc.
With LW, You will have to "cheat" because LW doesn't provide any type of
diffusion (and I don't believe there are any plugins available that do) --
as others in this thread have pointed out. Anyway, give this a try:
Draw an image of your diffused spectrum in a program like Photoshop or
photograph a real one shat is projected onto a white wall or suitable
surface. Use the image as a projection map for a spot light. Place
spotlights projecting this map inside your prism wherever you need a
diffused spectrum emission. You can fine-tune the appearance of the
reflected spectrum on the sides of your prism and on other surfaces by using
the BRDF shader or Worley's Gaffer.
If you need to animate the effect, I would imagine that the same technique
would work, but you may have to produce an animated/changing spectrum map to
get the right effect. Perhaps a procedural spectrum or adding some
noise/turbulence to your spectrum can accomplish this...
...Just some suggestions...
- Jeff Kilgroe : change the .nospam to .com to reply by e-mail!
- Applied Visual Technologies, LLC