Hello Uzin, you asked me to have a look at this some time ago in a PM, unfortunately I could see no way to help at the time
I took a look at the SketchUp model again yesterday and realised it was possible to save the model into a format called COLADA.
That enabled me to open it up in Blender:
In producing the COLLADA file SketchUp also made a folder containing the textures:
Sadly not being a Blender user I have no idea how to take it further in that application, even how to
apply the textures to the 3D never mind actually extracting it into a usable format for IL-2.
I tried to see if Blender would save what I had into some kind of format that would enable me to open
it in my gmax application, 3ds and obj were the two I could save, however, it got me not much further.
I was able to open the 3ds file in Meshconverter:
Some time into the early hours of this morning I managed to get something into gmax but it was not
the complete model from what I see.
Sorry my friend, so near yet it seems so far.
Investigations and tinkering will continue, however, I feel my programmes and ability will not get this
one into the sim, however, I can post up the files here that I have and hopefully someone out there
who uses Blender might be able to progress this further for you.
Take care.
Wishing you all the very best, Pete.