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Creating "Glowing" Objects

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Creating "Glowing" Objects

Postby redsun1979 » Thu Jun 01, 2017 7:28 pm

(Im very new to TD). In blender I created a glowing orb and animated it moving in and out of a box. The orb casts light on the box and is the only light source in the scene. I exported this as an FBX and imported it into Touchdesigner. The animation and geometry are all there exactly as expected but the orb does not cast light on the box ( or maybe the box does not register the light being emitted from the orb). How do I get the orb to emit light, or get the box to recognize the light being emitted, or is it something else entirely? Thanks for your help!
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Re: Creating "Glowing" Objects

Postby raganmd » Fri Jun 02, 2017 1:42 am

It's hard to know exactly what's going on here without seeing your fbx.

That said, you might try adding a light into your imported animation and making it a child of the orb to see if that gets you closer to the effect you're after.
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Re: Creating "Glowing" Objects

Postby nettoyeur » Fri Jun 02, 2017 5:30 am

And when you have the light itself functioning by doing what Matthew said above, you can fake a glow effect for the orb itself by using the colour buffer trick, as demonstrated by Pete Walker in this video:
https://vimeo.com/195465501
(the glow effect is added around the 20min mark.)
Idzard Kwadijk | freelance TouchDesigner consultant | IdzArd.com
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Re: Creating "Glowing" Objects

Postby redsun1979 » Fri Jun 02, 2017 8:26 am

Ah, thank you. Adding a light and making it the child of the sphere achieved the affect I was looking for.
Attachments
Light Sphere A.2.toe
(6.97 KiB) Downloaded 384 times
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Re: Creating "Glowing" Objects

Postby mtvizuals » Fri Jun 02, 2017 3:04 pm

I'd like to learn more about using fbx geometries in TD. Can you attach the fbx for this touch example? (Light Sphere 2.fbx)
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Re: Creating "Glowing" Objects

Postby redsun1979 » Fri Jun 02, 2017 9:46 pm

Yep:
Attachments
Light Sphere 2.fbx
(198.91 KiB) Downloaded 313 times
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Re: Creating "Glowing" Objects

Postby cataliz3er » Wed Aug 21, 2019 9:00 am

Hey there! Came across the same problem. I'm trying to simulate the light from an LED strip hitting the surrounding walls. I've instanced the LED-s as spheres along a circle path. I'm also playing around with a bigger sphere and testing shaders on that but I can't seem to make it actually emit light.
Screenshot (2).png
Screenshot (2).png (774.8 KiB) Viewed 347 times
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