Obj mesh import - Quads get triangulated

[mitchfx]

It appears that any quad polygons in an existing obj file get triangulated into faces on import into Photoscan.  Is there any way around this?  My meshes are being exported to Zbrush for retopo (zremesher) and UV unwrapped to then be re-imported back into Agisoft for texture re-projection.  Right now I'm simply taking the resulting texture map and applying to the same OBJ exported from Zbrush to avoid triangulated faces...but it would be nice to figure out a way to avoid this in Photoscan. 

Thanks,
m