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Question by Zona · May 26, 2011 at 01:15 PM · blender

Why the Blender mesh only see half of it?

Hi, I made a cup mesh in Blender and export it. The first time I lost some faces when I put it into Unity, and I fix it with pressing Ctrl + N to calculate normals. But the second time the mesh didn't lost faces, it lost half of the mesh. I can see the whole mesh on the top, but it will transparent on the side I view. Why? Please help me, thanks a lot!!!!

CLICK TO SEE THE PICTURE

Thanks for save and iantlloyd's answer! But it still didn't work. When I flip normals, it still show half of it... but show another side. (See the below picture 2) How come? !

CLICK TO SEE THE PICTURE 2

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avatar image Sebas · Jun 02, 2011 at 07:49 PM 1
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Obviously, if yo flip the normals, the other side of the face is going to be rendered, hence the other half of your model is shown. You'd have to make the faces double-sided. I don't use blender but check whether it gives you the option to render the faces double-sided. Otherwise, you can just create additional geometry and have the outer sides of both faces be rendered (by flipping the normals repsectively).

avatar image Zona · Jun 09, 2011 at 02:41 PM 0
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Thanks! I got the problem clearly!:)

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Answer by cidmodder · Jun 02, 2011 at 08:37 PM

if its your normals theres a way you can view all of your normals to tell which way they are facing and then you can turn them to have the arrows facing up.

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Answer by iantlloyd · May 26, 2011 at 05:26 PM

if ur using a current version, select backward faces, flip normals with, SPACE > search "Flip Normals"

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Answer by save · May 26, 2011 at 02:29 PM

It sure looks like the normals of the outside of the cup is reversed (pointing inwards). You can fix this by selecting the wrong aligned normals and reverse them in blender.

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