I just tested the MP readiness of my Cessna 210 by opening two instances of FG, and was very disappointed to see that the interior of the MP model is completely missing ! Which I don't have any explanation for - on the primary instance the interior is loaded fine and without any errors. Can you give me any clues what I could be doing wrong ? (I do see the MP interior of other aircraft, such as the C182)
In the LOD settings I have High Detail only for AI/MP aircraft and 1500 meters for the Interior, and it's not showing up even if the secondary (viewing) instance is positioned directly besides the MP aircraft.