Spring RTS Engine

Is it possible to have help to fix this behavior plz? BA10 devs cannot fix it alone it seems, so help is more than welcom.
Correct behavior would be that transport stop moving horizontaly while being close to hill and move verticaly instead?
Ideas?

maybe they need to set the "useSmoothMesh" unitdef to 1

but yes, either way the aircraft should be aware of the cliff and move accordingly instead of running into it..

Doo said usesmoothmesh unitdef is already sey to 1

Transports never follow the smoothmesh if given a load or unload order. You can work around this by inserting a move order (to roughly the same coordinates as the *load) in front of it.

Making aircraft look ahead further across terrain isn't too difficult but will cost performance.

would it cost so much performance if its only an issue for transport?