Help with a persisting normals problem

Unity Engine
1

Hello all,

I’m just starting on developing a game, but I am having a problem with flipping normals in Blender. I have the setting in which I can see the blue lines indicating normals on, and I can see that the normals are all flipped and that they should be visible, but when I go to open it in Unity it just messes up and I can see through it. I’ve been scouring many forums today and I can’t seem to find anything like this problem. If you guys want screencaps I’d be happy to provide them.

Thanks in advance,
Scott

2

Have you tried letting Unity calculate the normals for you on the import settings?

I’ve had issues with imported normals on OBJ files for a while now, and the only real workaround I’ve found is to let Unity calculate the normals for me, and take this into account when modelling to ensure I get the smoothing I’m after.

3

I changed the Normals setting in the import section to “Calculate”, but it still looks the same. Whenever I try resaving it and then importing it. Here are two screencaps of what is happening visually. I’m trying to make an extremely basic blocky pistol-type object.
1: ImageShack - Best place for all of your image hosting and image sharing needs
2: ImageShack - Best place for all of your image hosting and image sharing needs

4

Interesting. What file format are you using? Have you tried opening your models in another program beyond Blender or Unity? (This would indicate if it was a problem with you file or with Unity importer)

5

I would do this, but I’m not sure which programs besides Blender can open up and view .blend files? Could you point me in the right direction? I may also post this on Unity Answers as well.

6

Off the top of my head, I can’t actually think of any. What you could do instead is try exporting from Blender in a different file format (OBJ or FBX) and see if you get the same import issue.

7

I’ll go try that after I finish my coursework. Thanks for the tip.

8

From your first screen shot it looks like all your normals are pointing inward.

In Blender go into edit mode , select all and then press CTRL + N to recalculate normals. By default this command will calculate all normals to be pointing outward. Take note if there is any degenerate geometry this operation will not work properly.

9

I’ve already tried this multiple ways and multiple times. It does not work for me, even though the gun is perfectly normal with no faces intersecting/self-inversion. It is made from only one cube.

I just imported in both FBX and .3ds and neither work. I’m going to try a different model and see if it yields any other results.

10

If your still having issues, attach the .blend and .obj versions of your model and I’ll take a look and see if I can figure out what’s going on.