units setup max/vray

[BELCORP_SAC]

Hi guys, I always work in meters and dont have any problem whit ligthning in vray, I always use autocad for modeling architecture projects and import from max. This time I have to use an feet/inches autocad project, so i imported as usualy but the lightmimg seems to be messed up.
anybody whit a tip in here please? What may be the right units configuration from autocad and max to render right in vray?

Thx in advanced.