How to disable the light shading substance painter does?

[Alex27655153jpy0]

These lighting settings are messing my texture up in game, how do I make it so Substance doesn't make random parts of the model appear different? Here you can see it's made the top of the gun lighter.

  

[davescm]

You can change the environment map used to light the model and show reflections in the surface.

Filter your shelf by environment, then drag a new map into the 3D viewport.

Dave