I love you. Deleting the custom split normals solved the shading issues I think entirely (have to do a closer look). I didn't know that was a thing until now. I'm honestly not sure how autosmooth does the calculation. Is it anything above the number or below the number (< than 90 or than 90. )
The main shot of the environment is solved i think =) The lab area though is not, so i'm trying to lay out the props in a way that feels pleasing to look at.
Thanks , I solved tough reexporting parts subdivided I guess the problem was about some items that where symetrical and others not exported as a single obj....
It`ll become a mess, masking isn`t precise ... solved it by zremeshing the whole mesh,polygrouping the part needed to be fliped and then detailing again.. thanks though :)
What software are you baking with, and what software are you viewing with? These two programs need to be synched to solve seams. http://wiki.polycount.com/wiki/Normal_Map_Technical_Details#Synched_Workflow