Select only backfacing polygons?

FFQOTSA

Hi all,

I am currently in the process of making a Mazda RX8 in 3DS Max. To be able to work on it at college, i had to save it as a 2013 file version in max. (my college has 2013 whereas i have 2015). When i opened it in college, all the faces were backfacing, so i flipped them back. However now im back home, and some of the faces are backfacing, and some are not.

So my question is: How can i select all of the backfacing polygons on a mesh and flip them ONLY?

All answers ive found just tell me how to flip all faces which i dont need.

Any help wold be great.

Thanks

Chimp

I'd like to know this too actually, but in the mean time you can unify them and then flip once if needed. I don't believe editable poly has it funnily enough, so check edit mesh

FFQOTSA

i tried looking at edit mesh. but click on unify did nothing. :P

monster

Editable Poly will break edges along flip normals, so unify won't do anything. Convert to Editable Mesh do a weld operation with a really low tolerance, and then try Unify again.

Also, you can try selecting By Perspective, with the value set to 90. Then invert the selection.

Chimp

fantastic, thanks monster (and FFQOTSA for asking in the first place)