Normalmap flipped when baking

Illuvision

Hi polycount, first thread I started here

I'm having a problem with my normalbake, I created a gun, and when I started to bake my normals from my high poly onto my low poly, my normals on the other side of my model are flipped.
I used the symetry modifier to create the gun and I think the problem lies somewhere with my use of the modifier.

Here are some examples of what I mean.

http://gyazo.com/a1aad8ce86d73e2964bc6a3f62b783ba
http://gyazo.com/ee26b19a78a165871ef20e4728dcb7d7

Any clues how to fix this?

Luka

could you show your UV map, normal map, did you move the symetried part 1 unit left in UV spaca?

Illuvision

I collapsed the symetry modifier onto my low poly and then started baking
This is my uv and normal

http://gyazo.com/573c3db349c8b2ee3a0b889302aec878 (uv)
http://gyazo.com/8e380b29791dbe1e8e2d78b7459f648d (normal)

Luka

ok, well get all the symmetried UV islands moved 1 unit left in UV space and rebake. report back

Illuvision

The I have to rearrange the rest of my uv's to minimize uvspace loss?

Luka

just do this



there is a select all mirrored faces option in max, then move(relative) 1 in U or V

Butthair

To reinforce what Luka is saying..
http://www.polycount.com/forum/showthread.php?p=1707597#post1707597

Illuvision

Then I only have to unwrap the half of it? I collapsed my model with the symmetry so I have a full model and I unwrapped that model

WarrenM

Basically, build half the model, UV it, mirror it, offset mirrored UVs. bake.

Illuvision

Thx for all the advice already, gonna do some rebakes and post the results!

JedTheKrampus

You might find this video helpful to your understanding of normal bakes. [ame="http://www.youtube.com/watch?v=OONQzKcWeMY"]http://www.youtube.com/watch?v=OONQzKcWeMY[/ame]