Today I have worked on two bugs in ModelConverterX that deal with levels of details and the FS2004 scenery MDL format. The first one I fixed is that levels of detail where not exported correctly to the FS2004 MDL format. This should be working again now.
The second one is reading the levels of detail from the MDL file. This bug is almost solved, the reader will now read the different levels of detail. However the number calculated for the different levels of detail are not yet correct. I still need to figure out the exact math to determine them. The numbers calculated now are close to the actual values though.