Again, I encounter some problems in the development of my custom aircraft. I have a 3D model which is comfortably in the poly-count limits (around 35K faces). However, when I open it in the simulator, it is incredibly laggy... I have found out that the reflections are costly, so I have disabled the reflections alltogether in the 3D model, but it still doesn't solve the issue. Also, the TMD file of the aircraft is still pretty simple, and I don't see why this would be the cause...
If anyone knows what could be the source of the lag, I would appreciate ;).
Happy flying !