Some objects turn black no matter material properties

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Luc
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Joined: Wed Sep 10, 2008 11:17 pm

Some objects turn black no matter material properties

Post by Luc » Wed Sep 10, 2008 11:27 pm

Hi everyone !
I'm new to Indigo and 3d modeling and I have a lot of problems :wink:
But there is especially one that is really annoying :

I'm currently modeling a seringe so I have to make a tube made of glass.
At first everything is okay, the render of the tube is really good, but after adding some new pieces, my tube now renders black (like an alpha matte).
I tried changing materials, even using materials of other objects of the scene that work good, but so far, none of this worked...
I even tried to use a material from the matDB, still black.
Finally I re-started from scratch, but the new tube also render black.

If you have an idea of where my problem could be. :(

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fused
Developer
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3D Software: Cinema 4D

Post by fused » Thu Sep 11, 2008 12:10 am

check your normals. they have to point outwards.

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Pinko5
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Location: Italy

Post by Pinko5 » Thu Sep 11, 2008 12:12 am

Have you control the face normal??? Go to edit mode select all faces of the black object with (A) then CTRL+N...... try to render again...
ciao
Luca. ;)

Luc
Posts: 4
Joined: Wed Sep 10, 2008 11:17 pm

Post by Luc » Thu Sep 11, 2008 12:27 am

Just checked the normals, but no change...

It rendered fine just now, no apparent reason as I didn't touch anything...
I tried to render again without touching anything and it rendered black once again. :?

I hope there would be a way to have more stable results :)

MSUdom5
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Post by MSUdom5 » Thu Sep 11, 2008 2:45 am

Glass takes a little while to get the hang of. Still sounds to me like a normals problem. Could you post a picture or two of your problem?
Last edited by MSUdom5 on Thu Sep 11, 2008 4:49 am, edited 1 time in total.

Luc
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Joined: Wed Sep 10, 2008 11:17 pm

Post by Luc » Thu Sep 11, 2008 4:46 am

This is not a normal problem, because I tried to add->mesh->cylinder and it was black too (I don't it could have normal problems)...
The problem doesn't always occur, it seems to occur for no apparent reason.

Quite strange. :?
Attachments
im1220995412.png
The cap and tube are made of the same material.
im1220995412.png (720.09 KiB) Viewed 3128 times

MSUdom5
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Post by MSUdom5 » Thu Sep 11, 2008 4:48 am

Interesting... Could you zip and post your .blend file? I'd be happy to take a look at it.

EDIT: If the two meshes are intersecting each other, it could be a precedence issue.

Luc
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Joined: Wed Sep 10, 2008 11:17 pm

Post by Luc » Thu Sep 11, 2008 6:54 am

Precedence it is ! ^^

Thanks for the help everyone ! :D
Attachments
im1221067902.png
Everything works great now !
im1221067902.png (408.26 KiB) Viewed 3111 times

MSUdom5
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Post by MSUdom5 » Thu Sep 11, 2008 7:03 am

Looks great!! :)

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Kram1032
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Post by Kram1032 » Thu Sep 11, 2008 8:28 am

I still hate syringes :(

Great model, anyway :D

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