Duplicated Hand Producing Odd Effects

Technical Support Modeling
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1

Hey there everyone,

I recently went into Blender to rework one of my characters hands. Since I couldn’t get X-mirror editing to work, I decided to just delete one of the hands and edit the other one since it was all symmetrical or as close as I could get it.

After I finished, I found around the same point where I deleted the other hand and duped it. I then rotated around the world origin by the x-axis so it would be perfectly in place. All that was left was to bridge the edge loop. between the arm and the wrist.

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The only thing is that after I did it, the smooth shading showed me this!
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I thought it was just some kind of visual 2.8 bug or something, but when I rigged the whole body to the rig I made, this happened to me.

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It’s like the automatic weighting had no idea it was there or something.
I even tried this out on the hand that was edited on and kept on the body and it worked perfectly normal with the rig, it’s just this one hand causing trouble.

Is there any reason why this happening? I’m not too smart with Blender, so any help would be appreciated!

Here’s the file: Kbold_New.blend (1.4 MB)

2

I think the copied hand has reversed normals.

3

Really? How would I make the normals go back to normal?

4

Select all and only the Vertices/Faces of the hand, then from the menu Mesh -> Normals -> Recalculate Outside (Ctrl+N).

5

I opened your file and noticed that the object is not symmetrical at all; this is not recommended for a correct rigging.

Schermata%2031 Schermata%2030
I suggest you to remove one side of the mesh, create a well-aligned central loop and then duplicate/mirror all the geometry on the other side; the easiest way to do this is through a mirror modifier.

EDIT:
and don’t forget to Apply Loc/Rot/Scale to the object before parenting it to the armature, currently it’s rotated by 90° on x axis.

6

Ah gosh! thanks a ton for the extra help too! I just ran the sculpted model through Zbrush Zremesher because I heard it can evenly decimate and make a low poly mesh. Looks like I was totally wrong though!

Thanks again for the helpful advice, I really appreciate it and will absolutely give the mirror editing a try.

Thanks again!