Opps Sorry about the illustraion, it got messed up when it posted it.

Thomas Lake wrote:

> I have another good way to model LED's although its no good if you want to be able
> to see the entire LED itself. This is best for modeling the LED's you see on
> electronics like the three LED's on your CPU hard drive, turbo and power. What you
> do is create, using CSG's a small room behind where you want the LED to be, make
> this room have a 100% reflective texture. Then cut a small hole the shape of the
> LED from the hole to the surface of you object. Now create a small coloured panel
> and place it in front of the room, but a little away from the surface of the
> object. Now create a light and place it in the room. When rendered this creates a
> very realistic glowing effect. Below is a picture of mine which shoes this effect,
> look at the CPU case, and the keyboard.
>
> ___________     _     |____Surface of object.
> |                     |__|_|__|
> |  Small Room     |  |________Coloured LED panel
> |                      __|_|__
> |___________|   |_|   |
>                                  |
>
> Ken wrote:
>
> > Neil Mercer wrote:
> >
> > > Hi there,
> > >
> > >     I'm trying to model (amongst other things) a LED.  Building the shape
> > > has not really been a problem, but now I want to be able to include a light
> > > inside it so I can make the LED light up (obviously).  I'm having trouble
> > > getting the light to look right.  So far it either floods the scene with
> > > light (i.e. too intense) or merely makes the LED structure look like it has
> > > a shiny surface texture.  What I would like is that nice glow that looks so
> > > simple and easy!
> > >
> > >     Also, at this stage I've been colouring the LED itself and using a white
> > > (or near-white light).  Would it be better to have a clear LED and a
> > > coloured light?
> > >
> > > Thanks in advance for any help.
> > >
> > > Neil.
> >
> >   Instead of thinking of it as a light source think instead of it as
> > a glowing object. One trick you might try is making your LED
> > texture semi-transpearent. Then inside of it plant a seed that
> > will be the glow source. If you add a very high ambient finish
> > to it it will more realisticaly model a glowing effect than a light
> > source will.
> >
> > example:
> > assumes your LED is 1 unit in size adjust accordingly.
> >
> > object{LED
> >  pigment{rgbf<1,0,0,.8}}
> >
> > sphere{<0,0,0>,0.1
> >  pigment{rgb<1,0,0>}
> >   finish{ambient 3}// adjust to desired effect
> > }
> >
> > Ken Tyler
>
>   ------------------------------------------------------------------------
>  [Image]

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