Yeah, but the Moon terrain is not used at all; GENERIC_GLOBE_TERRAIN is set up to use the global texture. MOON isn't actually used.
The mission site is in the ocean.
There is no globe texture there.
So the mission texture (MOON) is used.
That's why I use the MOON terrain for all deployments which use GENERIC_GLOBE_TERRAIN script - to see at a first glance that something's not right.
Then it would be better to use a texture that works with all map scripts
Otherwise you'll just see a crash at the first glance.
But more importantly... What is "type of mapblock=3"? Do you mean group 3 (north-south road)?
Yes, I meant N-S road group.