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Kerkythea Rendering System • View topic - black area has stripes and metal is white
Page 1 of 1

black area has stripes and metal is white

PostPosted: Thu Mar 14, 2013 5:38 pm
by nuknuk
Tearing my hair here.

I don't know what else to do here doing combination of lights and materials, from chrome to brush aluminum, etc. pls see my attachments

And why is the middle that supposed to be plain black has stripes?

help pls

Re: black area has stripes and metal is white

PostPosted: Thu Mar 14, 2013 5:41 pm
by nuknuk
additional attachment is here

Re: black area has stripes and metal is white

PostPosted: Fri Mar 15, 2013 10:10 am
by tridem
I can't say with no doubt...but I think the stripes are produced by a z-fight issue, that is two co-planar faces with different material. You have to fix it in the modeling app (sektchup or whatelse)
The chrome material looks weird because of bad lighting/environment or a too low render setting.
Generally speaking...
Avoid any colour execpt pure black for the shadows
Avoid flat color background, use instead a sky color or better a studio global (there are some to download here in the website)

Re: black area has stripes and metal is white

PostPosted: Fri Mar 15, 2013 7:41 pm
by nuknuk
Thank you Tridem. I learned how to use globals. I also fixed the stripes.

Re: black area has stripes and metal is white

PostPosted: Fri Mar 15, 2013 11:03 pm
by Fletch
avoid using "ambient" in any material.
use "diffuse" color instead.
ambient + any specular makes the material reflect more light than it receives. This is physically impossible. So try not to do that.
Open and use and study good material libraries. Anything by PatrickS or Alex will be a good library to learn from.