The lighting/shadowing of level blocks and that of models ist different.

You should use the imported door in MED only as measure for the proportions for the door model wich you build up from scratch in MED.

Even then the lighting/shadowing will be different. Maybe, choosing a lower ambient for the model, or setting its unlit flag, will change the lighting as you please..

http://www.puppenheim.org/
http://www.wuerfels-welt.de
Old Game Tutorial: http://www.puppenheim.org/MITutorial.zip
Free Game Editor: http://puppenheim.org/AlienalsWeihnachtsmann.zip
http://www.puppenheim.org/blender_starting_main_settings.txt