I exported in SU8 version, .3ds (a lot of time consuming, i´m testing exporting by layer separately now), not .fbx or .obj, which will be the next to explore.
Tried to put the same aspect ratio as SU screen in Max, but was a no no.
I know is a matter of FOV, but, how can i manage FOV SU settings and max render (aperture¿?) to match the images?