What are these black areas?

[sublime]

Hi guys

I have several questions on this test scene I made. As shown on the attached images, the first box set are rendered nice and grey, but when I applied glossy material these black areas appears on the back sides of the boxes. Any idea what these might be? Also, how do we apply UVW map?

Thanks

[radiance]

it's because you have normal smoothing enabled on objects with too high angles between faces.
you should disable the 'smooth' option on the material node.

Radiance

[sublime]

ok radiance, i'll give it a go,..do you have any msn messenger by any chance..?

[radiance]

ok radiance, i'll give it a go,..do you have any msn messenger by any chance..?

i have already enough private communication, i'd like to leave support on the forums so other can help too.
it's not easy having 80 mails in your inbox every morning.

Radiance

[sublime]

hahaha looks like everyone want a piece of you, fair enough, i let you off, what about my second question about UVW, no matter how i move the slider on the scale tab,..the texture remain the same?

[radiance]

hahaha looks like everyone want a piece of you, fair enough, i let you off, what about my second question about UVW, no matter how i move the slider on the scale tab,..the texture remain the same?

you apply uv maps in your 3d host app prior to exporting.

Radiance

[sublime]

ahh okay, thanks matey