Ok so I imported a mesh from Maya>Substance Painter>UE4 and the result is far from what i have in Substance painter. I followed this link A new, community-hosted Unreal Engine Wiki - Announcements - Epic Developer Community Forums
and got something like this:
When in Substance painter I have something like this:
I lost a little bit of details, the colors seems wrong and I have lighting issues.
UVs and Lightmap:
Also when I reimported my static mesh into UE4 with a lightmap it was a bit better but as soon as I rebuilt the lighting it went back to the same lighting issues.
Anyways if you need more picture to know whats going on please tell me. Thank you guys.