For this specific project i used datasmith, but either DS or FBX show the same symptoms.
About the GPULightmass, despite being Loushang’s or the native, what bugs me is the fact that in the other PC it worked like a charm, with the exact same settings and everything, i mean, it it supposed to work the same way in all equipments right?
And the plugin is not THAT old, since there is a version for the last unreal 4… -.-
Thanks again for the feedback!