GlowShader question

Introduction to Maya - Rendering in Arnold

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# 1 05-02-2004 , 03:55 PM

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Location: Auroville, India

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Dear People,

I am trying to create a planet with a thin layer of atmosphere on the horizon of the planet, and only on the part that is illuminated.

I have tried various approaches, the most obvious one using Special Effects/Glow Intensity, and although I have succeeded in reproducing something close to what I want, it would be difficult to animate the scene the way i have set it up.

I was wondering whether any of you have some ideas to offer me.

Thanks

Hanuman

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# 2 05-02-2004 , 04:43 PM

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Create another shell on the outside, and parent the 2, and put a glow shader on the outer shell - should work fine user added image

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# 3 06-02-2004 , 04:12 AM

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Yes, I did that first actually (following a tutorial from the Gnomon Workshop DVDs) but the problem with that is that the glow appears all around the sphere, even when there is a dark area to the sphere. And I want the glow to appear only at the horizon.

I tried adjusting the Threshold attribute of the ShaderGlow node, but that was not very satisfactory.

If it helps I can post a low res figure of what i am trying to achieve, as i am afraid that i am not being very clear?

thanks

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# 4 06-02-2004 , 04:25 AM

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to make glow appear appear at spots within camera angle range
in the glow brightness or threshold (not sure)
connect it to a sampler node. this should reduce glow in areas dark and increase in areas bright...

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# 5 06-02-2004 , 04:49 AM

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I would like to see a image please. Might help the advice given.

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# 6 06-02-2004 , 05:49 AM

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a nother simple way to do this would be to use a ramp with a sampler info node set to faceing raito. or if you have maya 5 use the ramp shader.

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# 7 06-02-2004 , 06:36 AM

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Originally posted by Pony
a nother simple way to do this would be to use a ramp with a sampler info node set to faceing raito. or if you have maya 5 use the ramp shader.

Originally Posted by

that's what i meant....

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# 8 06-02-2004 , 06:51 AM

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thanks for all the suggestions!

While I work at it I would like to post an image, but suddenly realize i don't know how to (oops). Cut and paste doesn't work apparently...

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