3dsmax 2011 Edit poly - flipped faces after mirror/clone/attach

sebi3110

Hey folks,

I think that problem exists for several 3dsmax versiosn now. And I don't know how to fix that bug.

You may have ran about something similiar too. The problem is that 3dsmax accidentally flips the faces/ normals when you mirror, clone or most often while attaching objects in edit poly - randomly.

Have you also seen such problems?
Anyone know how to fix that?

Cheers

Scruples

Is the mesh imported from some other program?, did you try throwing an edit poly modifier ontop of the stack before you mirror/clone/attach?.

Here is a similar thread http://www.polycount.com/forum/showthread.php?t=79364

Noors

It's not random. An object has a transformation matrix. When you mirror an object, the matrix gets flipped, but the polygons normals stay still.
To reset the matrix, you should apply a Reset Xform (under Utilities) When a flipped matrix is reseted, you'll see it will flip the faces. So you have to select them and do a "Flip" in your edit poly modfier. You could also use the "Normal" modifier to conform face normals.

Same thing happens when you attach an object with a flipped matrix to an objet with a reseted matrix, the previous object matrix is "reseted" and the faces of your object get flipped.

For stuff like a character, you could use the Symmetry modifier instead, to avoid that little process.

Neox

you could also use the mirror modificator, which doesn't flip the normals

sebi3110

Okay, and what can I do when I ahve random flipped faces in my mesh that i can't really see in 3dsmax but when exporting in cry engine 2 they get vissible because they're invisible then?unify normals script didn't do the trick for me...

Noors

Did you Reset Xform it ?
The flipped faces should appear black. Or right click on object>object properties>General>check Backface Cull
So only 1 "side" of the face will show up. If some of of your face become invisble, they are flipped.

sebi3110

Yeah had resetted xform.
But I just did a workaround now. Copied another piece which exported correctly