Another issue with normal maps

Hi everyone, as every beginner with 3d model, I also have a doubt with normal map.

Today I noticed something weird with my first model using normal map, so I made a simple cube to try to figured out how it works.

This is an image from model viewer, inside the game happens the same thing.

[Blocked Image: http://s10.postimg.org/60dy46ctl/cube_from_Model_Viewer.jpg]

As you can see, the side faces above and below of the cube are reversed. In this image all the vector's directions are positive (X+, Y+, Z+), I also tried with differents vector directions, but I got worse results.

Below more information about the model and the normal map itself.

[Blocked Image: http://s10.postimg.org/7tlg68ne1/topology.jpg]

Thank you guys, this forum is amazing.

See ya.

Edit: I'm working on source sdk, to global offensive to be more specifically.

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Quote from kikette

Hey dude !

Normal map isn't an easy thing to master... absolutly not easy.

Maybe you could share your model and your texture ? We can' take a look without =).

I can do it, but it's a just cube with one color texture.

Quote from knj

i think EVERY one of us needs to go through the CUBE - NORMAL dissaster LOL, on the out side it looks like very easy problem but after several hours of frustration dammmn this is the WORLD's HARDEST SHIT, after you get how it works it trully is very easy

hope it helps you

I'll take a look.

Quote from 3Dnj

You need to reverse your green channel.

I did it already, same with other channel combinations.

This is what I get with green channel reversed.

[Blocked Image: http://s9.postimg.org/fk9i58hlr/greenreversed.jpg]

Thank you guys.

Here is it.

https://mega.co.nz/#!sYpWyRKY!RIe…_xadcVAbole7KXc

Today I solved the problem about the cube, contrary to what we were thinking, the problem was not with the normals directions. The only thing that I did to find the real problem was bake the normal with the 3ds max. So the problem is with xNormal, as you can see in the images below, the results with both programs has a huge difference. Now I'll find out why I'm getting weird maps with xNormal.

[Blocked Image: http://s18.postimg.org/5m92s7ah5/Sem_t_tulo_1.jpg]

Update: Those differences between the normals maps there's nothing to do with 3ds max or xNormals, it's due to your smoothing groups. There's a very good guide explaining all that I was looking for. That's it! Thank you.

Guide: http://www.svartberg.com/tutorials/arti…normalmaps.html by Ariel Chai