View Full Version : Creating an LED

06-14-2010, 07:46 AM
Hello. Does anyone have a decent tutorial on making LED's? I've checked Member.Shaw (http://members.shaw.ca/lightwavetutorials/Main_Menu.htm) and didn't see anything there or on google either. I'm looking for the lighting side of it. I've tried cranking the luminosity of some polygons, but that didn't look quite right. I also tried several light types scaled so that they could be encased in the object and didn't have much luck there either. I have a gamepad, computer speakers, and a usb internet hub to render and want the little lights turned on for effect. Any links or advice always appreciated.

06-14-2010, 09:10 AM
When you tried the luminous polys did you enable Glow (Effects - processing tab) and the glow intensity(surface editor - advanced tab)? This usually does it for me.

06-14-2010, 09:49 AM
Don't make the plastic dome glow, the dome is clear or coloured plastic, the light comes from the diode inside. LED's also have a very narrow light band, they'll be quite bright when seen face-on but become very dull when viewed at reasonably low incidence angles which is why refractive glass and plastic is used to diffuse and disperse the light.

These two recent doodles both have LED's, both use luminous poly's and both rely on a clear diffuser to spread/refract the light. The glows are achieved in post and working in linear light ensures that the renders aren't blown out or under exposed.


06-14-2010, 11:41 AM
its all about getting the glows right with LEDs. do it in post like biliousfrog says, not in layout. you are going to have to tweak the glow to get it to look right and having to re-render every time you tweak the glow would be pretty ridiculous.

06-14-2010, 12:15 PM
I tend to use point lights inside of translucent geometry.
Optionally combined with a small lens flare.

(have a look at the gallery in my profile for an example)


Geoff Vane
06-14-2010, 02:01 PM
There are two kinds of LEDs: the narrow angle clear housed ones and the omni angle milk glass like.

The narrow angled would need a point light for the side view and a narrow spotlight flare for the front view.

The milky glass one can be made with ordinary glow, which also has a stuttering multiplexing effect when you render movements (very realistic). Or if you really need to get close, use hypervoxels for ultra realistic glow. Unfortunately you need to search for glow and hypervoxels if you want that. (can't remember how to myself) There is this guy who explained it. I used it once for making a nixie tube. Very handy, because it can glow uner glass, which glow can't.

06-14-2010, 03:40 PM
Thanks for all the input guys. Off to test.