How render LEDs on device

QCI1 · Mar 7, 2016

How render LEDs on device

Hello,
The Device has Clear Light Pipes that cover LEDs.
Problem: The the light from the LEDs that I have now spills out of desired area and creates too much reflection on the enclosure. I have to PhotoShop the spillover out of the image. Is there a good method for making LEDs?
Thanks,
QCI1

Swizl · Mar 7, 2016

Hi QC11,

It's a little hard to give specific advice, since I'm not sure exactly how you've modeled this. If the lights are a separate object from the body, you could try using a render tag to exclude just those reflections.

QCI1 · Mar 8, 2016

Thank you for the advice! I will try that.

QCI1 · Mar 8, 2016

I ended up using the Solid Material with high intensity for the LED inside of a light pipe that has Blurred Glass as the material. No reflections are on the enclosure now, so no need to PhotoShop it. I don't think they look very LED-like, though.

Thanks for the help!

Swizl · Mar 8, 2016

Yeah, there are no volumetrics in C3d yet, which is what we would need to create a proper glow type of material look. There are a few different ways to work around it, at varying degrees of difficulty. You can search around the forum for some of them and give it a shot. It may be easier for now to do a few separate render passes and do the glow in post in an image editor (like Photoshop, GIMP etc.).

QCI1 · Mar 8, 2016

Thanks for taking a look at this. I will keep poking at it.

QCI1 · Mar 9, 2016

I now made each LED with a Spot light inside a Capsule. The Spot light points down. 4 LEDs are in a light pipe. There are 3 pipe lights. I think the rendering shows a better bounce of light within the light pipes and the reflection on the enclosure is gone.

Swizl · Mar 9, 2016

QCI1 said:
I now made each LED with a Spot light inside a Capsule. The Spot light points down. 4 LEDs are in a light pipe. There are 3 pipe lights. I think the rendering shows a better bounce of light within the light pipes and the reflection on the enclosure is gone.

Looks great! Nice work around.

QCI1 · Mar 9, 2016

Thanks for the kind words!

frank beckmann · Mar 9, 2016

I once had a simular solution (http://www.cheetah3d.com/forum/showpost.php?p=34408&postcount=36) - but for box-shape plastic-covered LEDs I´d try another way by placing a bent polygon object over the light source with a solid shader with a render-tag with unchecked "Visibility for primary rays":
Just an idea of course.

Cheers
Frank

How render LEDs on device

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