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Missing side of the meshes

I have several problems with this pack: https://www.unrealengine.com/marketplace/cliff-tower-ruins

Some side of the meshes are missing textures or are invisible:



Did I miss something ? I'm sorry if this is a dumb question, but I can't find the solution anymore on the forum.

Thanks in advance

Product Version: UE 4.21
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asked Jan 05 '19 at 07:48 PM in Using UE4

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avatar image ThompsonN13 Jan 05 '19 at 08:01 PM

it looks to me like your normals got flipped. if thats the case then you can try reimporting the assets or you may need to take them into a outside program like may max or blender to adjust the normals. to check the normals in ue4 just double click the mesh to open it then click the button at the top which says normals. this will give you a visual representation of the normals direction, it should be some green lines that protrude from the face/verticies of the mesh.

also you already posted this question at the below link


avatar image Blueshift_ Jan 06 '19 at 10:05 AM

Hello, Thanks for your answer, you can see here what I got:


Sorry but i'm really new with this software. What does it mean ? Are the green lines showing something wrong on this picture ?

I try to use the option "double sided geometry" on the meshe or "Two Sided" on the material but it doesn't work.

avatar image ThompsonN13 Jan 07 '19 at 12:06 AM

from what i can see that one in the picture your normals looks ok in that one.

What does it mean ?

what does what mean?

"double sided geometry" not sure on that one. ""Two Sided" on the material" in this particular case its better to fix the underlying issue rather than use that option. two sided material is so you can see both sides of a single plane which is useful for things like plants which need to be thin, in your case however you wont be seeing the faces from the backside so theres no need to have them show materials it would be a waste. when i say backside in this case i mean from the inside of the mesh, think the area that would be solid in real life.

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