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Creating a Lightbulb
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These pages are a copy of the official truespace forums prior to their removal somewhere around 2011.
They are retained here for archive purposes only.
Creating a Lightbulb // New Users
Post by scifieric // Aug 9, 2008, 3:28am
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scifieric
Total Posts: 38
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Jumping to 7.6, I feel like a noob again.
I'm trying to create a lightbulb. Something like a deformed globe with a flare or SSS effect from the actual light source inside the lightbulb.
I thought Vray might be the answer but I'm obviously going about this incorrectly.
Even with a glass object, if I'm inside the object, everything is fine but if I'm outside, everything looks dark and there is no flare.
Any ideas? I'm open to any suggestions and thanks in advance! |
Post by seavu // Aug 9, 2008, 4:43am
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seavu
Total Posts: 46
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This is just a thought, but if you can turn up the number of "ray bounces" in vray see it that might help. |
Post by Jack Edwards // Aug 9, 2008, 4:52am
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Jack Edwards
Total Posts: 4062
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Is your light bulb a solid object or shelled object? To get SSS to work correctly the walls of your lightbulb object needs to have thickness. You may also want to try using the glossy shader with transmission since it can produce a nice SSS-like effect when transmition is turned up a bit, without having the long render time.
Interesting project btw, and probably one of the most difficult to get to look accurate. Most of us probably fake lightbulb effects instead of trying to reproduce them accurately because of the huge render time hit. |
Post by johnhoward // Aug 9, 2008, 7:25am
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johnhoward
Total Posts: 231
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What does SSS mean? Thanks. |
Post by scifieric // Aug 9, 2008, 7:27am
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scifieric
Total Posts: 38
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This is just a thought, but if you can turn up the number of "ray bounces" in vray see it that might help.
I had not thought of that. I can give it a try. Thank you!
Is your light bulb a solid object or shelled object? To get SSS to work correctly the walls of your lightbulb object needs to have thickness. You may also want to try using the glossy shader with transmission since it can produce a nice SSS-like effect when transmition is turned up a bit, without having the long render time.
Interesting project btw, and probably one of the most difficult to get to look accurate. Most of us probably fake lightbulb effects instead of trying to reproduce them accurately because of the huge render time hit.
I had tried it with both a solid object and then a shelled object ... but I haven't tried a solid that has had the interior subtracted. I'll give that a shot. Excellent idea.
Glossy with transmission ... I'll give it a try! Thanks!
Yeah, I've got an idea and I'd love to have a terrific effect and I'm willing to sacrifice time in order to get it ... within reason, of course! LOL! |
Post by jamesmc // Aug 9, 2008, 7:48am
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jamesmc
Total Posts: 2566
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My quick attempt at a lightbulb
Bulb
bulb light inside bulb (yellow)
spot light shining on exterior (yellow)
quick but not too bad...
Edited: Added the bulb obj, it's far from complete, but it's double walled and gives a bit more refraction. |
Post by Cthulhu // Aug 9, 2008, 8:09am
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Cthulhu
Total Posts: 48
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Is this the sort of thing you're looking for? This was made using the Lightworks renderer and a lens flare. The bulb object is set to not cast shadows so it doesn't block the light and flare effect.
Using Vray's GI, you can actually light a scene with a luminous object without any lights in it, but it won't give the "glow" effect. That's usually a post-process effect (like the Lightworks lens flare).
14074 |
Post by Cthulhu // Aug 9, 2008, 8:14am
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Cthulhu
Total Posts: 48
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Hey James, you beat me to it. :)
Different approach but nice effect! :banana: |
Post by splinters // Aug 9, 2008, 8:54am
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splinters
Total Posts: 4148
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SSS= Sub Surface Scattering. Think how light bounces off marble or how you can see light through a human ear...or how milk looks in a glass. Quite tricky to fake but possible in Vray and Dribble.
Check out the image in the link below (the boys arm):
http://www.buddyworldbooks.com/sample/cloud/games.html
good example of how SSS gives a nice soft waxy look...:D |
Post by scifieric // Aug 9, 2008, 9:24am
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scifieric
Total Posts: 38
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Holy cow, thanks guys! This is a marvelous amount of help!
What does SSS mean? Thanks.
I didn't see that you had posted before me.
SSS
Sub
Surface
Scattering
The way people look in light. For an extreme example, put a flashlight behind your fingers and look on the other side. You can "see through" just a bit.
My quick attempt at a lightbulb
Spec-Freak'n-Tacular!
I'll look at this in TS and see what you've done. Was this with V-Ray?
Is this the sort of thing you're looking for? This was made using the Lightworks renderer and a lens flare.
This is marvelous too! I need to play with both this and with the V-Ray option to see which will give me the result that looks best.
Absolutely outstanding and Thank You Everyone! |
Post by jamesmc // Aug 9, 2008, 1:15pm
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jamesmc
Total Posts: 2566
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Not as glowing, but a shinier glass effect using the outdoor scene with HDRI and caustics. |
Post by scifieric // Aug 9, 2008, 1:50pm
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scifieric
Total Posts: 38
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That's terrific!
It may be close to what I need to do. I'm running through V-ray tutorials now. I'll keep going with lighting tutorials as well.
Thank you very much. |
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