perhaps i am wrong, but i think second problem is big mess in lod settings. For example, lets have a look on 2 helos
ka-27
model = {
lods = {
{"ka-27.edm",100.000000},
{"ka-27-lod1.edm",200.000000},
{"ka-27-lod2.edm",1000.000000},
{"ka-27-lod3.edm",50000.000000},
},
collision_shell = "ka-27-collision.edm",
ah-64d
model = {
lods = {
{"ah-64d.edm",50.000000},
{"ah-64d_lod1.edm",100.000000},
{"ah-64d_lod2.edm",200.000000},
{"ah-64d_lod3.edm",300.000000},
{"ah-64d_lod4.edm",400.000000},
{"ah-64d_lod5.edm",5000.000000},
{"ld_tec.edm",10000.000000},
},
collision_shell = "ah-64d-collision.edm",
So, (if understand correctly, how this stuff works), ka-27 have nice little low res model up to 50km, ah-64d have green box (btw invisible from botton) from 5km to 10km and then nothing.