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I have a cube and I want to apply a concrete texture to the inside of it but, when i do, it only applies the texture to half of it on the inside and then the other half on the outside of the cube. Why?

enter image description here

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  • $\begingroup$ Please don't make your questions depend exclusively on others downloading the file, or reading links just to understanding the issue. Please use the edit option at the bottom of your question (i.sstatic.net/lXFuK.png) and add more information on how you set up your project. Add images that might help us understand your scene and settings. $\endgroup$
    – user1853
    Jan 15, 2020 at 3:17

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Incorrect, corrected after the first image

The issue is with your material's bump node. Change it to a Normal Map and everything works fine.

I don't know why the Bump node doesn't like hollow shapes, but every replica mesh I created and plugged into the material always ended up with those black surfaces. When I unplugged that Bump node, the problem went away.

https://i.sstatic.net/xEbZp.png

Edit:

Seems like I finally found the source at the same time as HelloHiHola. You probably meant to plug in your normal image into the Strength input, not the Normal input.

enter image description here

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    $\begingroup$ PS: For future reference, you may want to pack all external files into your .blend since people who download it won't have the texture files when you don't do so. $\endgroup$
    – stphnl329
    Jan 15, 2020 at 3:32
  • $\begingroup$ blender.stackexchange.com/questions/60495/… $\endgroup$
    – batFINGER
    Jan 15, 2020 at 3:33
  • $\begingroup$ @stphnl329 Thanks You! I'll try but I don't know how to do that. Also, thank you so much for the help. That worked for me, but I voted the first helpful comment as answered and I definately would've voted you up if I could do two. Thanks! $\endgroup$ Jan 15, 2020 at 17:59
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    $\begingroup$ @ProEffectsMAX The first part of this answer is actually the correct way to do it. The edit and the answer you put as solution is actually giving you incorrect results for the texture. A normal map is not supposed to be plugged into the Bump node. Not even into the Normal input of that node without using a Normal Map node. $\endgroup$
    – MrTheRich
    Jan 16, 2020 at 2:17
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    $\begingroup$ @MrTheRich Thanks for the heads up! $\endgroup$ Jan 16, 2020 at 2:19
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Your normal are most likely pointing the wrong way, in edit mode select all faces and press SHIFT+N to normalize their direction.

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  • $\begingroup$ That doesn't work here. $\endgroup$ Jan 15, 2020 at 1:23
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Faces have two sides by default so they are always unwrapped on both sides of the face. The darkness (not black as yo u can see a texture there ) you see is a problem with the lighting on the normals.

Make sure when unwrapping you are using the smart UV project instead of the regular unwrap, because i'm seeing some stretching in your unwrapping. (or give your mesh seams where you want the unwrap to "split".)

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  • $\begingroup$ That doesn't work here. $\endgroup$ Jan 15, 2020 at 1:24

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