.X and .3DS do not support more than one set of UV's - and since lightmaps use the second set of UV's on top of the color UV's -> no lightmaps with .X and .3DS.
And MAX has "funny" axis arragement, so your models may end up being 90 deg "off" unless your exporter can fix that automatically.
More about coordinate system differences:
http://www.discreet.com/support/max/faq/answer.php3?prod=dddstudio&id=1153
And MAX has "funny" axis arragement, so your models may end up being 90 deg "off" unless your exporter can fix that automatically.
More about coordinate system differences:
http://www.discreet.com/support/max/faq/answer.php3?prod=dddstudio&id=1153