CGTalk - Reflection solution.

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Rumr

01-13-2008, 02:35 AM

I am trying to get some fall off on my reflections. I seen some tutorials but I know there has to be a better way to plug in some nodes to seperate the reflection node from a material and then add a gradient node or something to it to have controll of the reflections. I am even wondering if anyone has seperated the reflection node and in the composit section gave it a blur or transparency.

Let me know what you tryed I am interested. I am really into logo renders and really nice shaders that look like glass metal and glossy.

I am trying modos demo and it came with a scene of modos logo with a simple gradiant map on its reflection and it works great.

Thanks for all your help.

James

shadowedge

01-14-2008, 09:33 AM

Hi James,

just confirming what you've said. I was confronted with this kind of a problem in one of my projects last year. What I did was render the reflection on its own pass, then I used a matte choker plus blurr in AFX to get a softer result. Just another compositing workaround to using a gradient in the render tree.

ebbmeister

01-14-2008, 09:56 AM

Plug an incidence node (suface/camera) into a gradient node. Plug the gradient node into the reflection node of a surface shader.

You could also plug the same gradient into the specular of the surface shader. Try a value like 0.75 by 0.25 in the incidence node (bias/gain) for a relaistic effect. You could also plug an inverted version of the gradient falloff into the transparency of the surface shader too.

Cheers
Phil

Rumr

01-14-2008, 03:35 PM

great help, I will try this out for a few days and get back on to hopfully show some good results.

Thanks a lot!!!

comanche

01-16-2008, 08:10 AM

The Architectural Material has all the options for fall off and fast interpolated blur. Also the view angle dependent reflection/transparency.

Regards,
Andreas

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