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Kerkythea Rendering System • View topic - Lamp Shade Black Spot?
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Lamp Shade Black Spot?

Moderator: ModeratorGroup

<<

Dave R

KT-Warrior

Posts: 144

Joined: Tue Oct 25, 2005 4:04 pm

Post Sun Dec 09, 2012 1:11 pm

Lamp Shade Black Spot?

Lamp render1st.jpg


This post is probably in the wrong forum. If so, I apologize.

The above is from a render I'm working on. I'm trying to sort out why I have the black areas on the lamp shade and I wonder if anyone might have a solution. I used the Basic Glasses F5 preset for the glass in the shade and then put in the material I used in the SketchUp model in both Diffue and Transmitted. There's an omni light inside the shade where the light bulb would be. Is the problem with my material or with the light? It looks like the shade has been burned.

thanks for any help.
<<

massimo

KT-Wizard

Posts: 606

Joined: Sun Apr 05, 2009 3:58 pm

Location: Italy

Post Sun Dec 09, 2012 2:15 pm

Re: Lamp Shade Black Spot?

Dave, I'm not sure to understand how the shade should be and also how you built the material. So maybe you can post some SS of the mat? Or the KT's scene? Anyway there are several ways to do a lamp shade mat: look for example under "plastcs" or .
You can easily tweak them for your needs. Those mat sould work better with unbiased presets. :grin:
<<

Dave R

KT-Warrior

Posts: 144

Joined: Tue Oct 25, 2005 4:04 pm

Post Sun Dec 09, 2012 2:21 pm

Re: Lamp Shade Black Spot?

Thank you, Massimo.

I'll take a look at your links. I wound up changing to another glass preset and it seems to be working much better. It's still chugging along rendering but you can see, no black areas.

Lamp render2nd.jpg


The material still needs adjustment so maybe I'll learn something in your links. The omni light is kind of large, too.

By the way, is there a way to get the color from the lamp shade glass to show on the background?
<<

irwanwr

KT-Fellow

Posts: 47

Joined: Tue Nov 15, 2011 12:51 am

Location: Indonesia

Post Fri Jan 25, 2013 4:55 pm

Re: Lamp Shade Black Spot?

<<

Fletch

KT-Team
KT-Team

Posts: 8564

Joined: Fri Oct 27, 2006 2:38 am

Location: Milwaukee, WI USA

Post Thu Jan 31, 2013 10:40 pm

Re: Lamp Shade Black Spot?

I think that's in the transmittance channel. you must render with a setting with "caustics".



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