You should try several MA terrains from scratch. When I checked the converted one you asked me to look at all the GV spawns. It would have been very simple for me to fix all the issues, especially where I'm at building 650,000sq mile terrains. Touching up an existing MA terrain is simple for me now, I often have to redo my whole terrain because I come up with a better paint scheme or technique for creating an existing style of topo feature by the last two or three feilds I lay down. I go back and redo every instance of that topo feature along with re-painting so it makes that 650,000sq mile universe have a quality of consistency while keeping to my theme.
Since you guys don't have something that Hitech has signed off on to not kill FPS in the MA, I have to keep building my current terrain expecting to work the micro combat terrain around each GV spawn business as usual with the existing polygons. The possibilities with bridges have not been fully explored and my current terrain I'm using the Med terrain set so that opens a whole new set of things for me to try. First, I have to finish creating the macro 650,000sq mile world based on it's theme, then I can play with spawns and micro combat terrain for GVs.
I forgot today to put in a short segment of river with the path tool at it's narrowest width and look at the results up close offline, gotta remember to do that. I've been creating the illusion of a 1300ft high rock pile made with sandstone strata all day and testing different ways to paint it. With Oceania since the tops of mountains were bare rock you paint light to dark from the top down through the canyons. It's the reverse when the mountains will be covered in grass and trees with canyons and washes painted sandstone or tan sand and trees. But first the whole area has to be painted with very light green than the darker forest added to the ridge lines. You cannot use the angle or elevation paint tools for all those canyons.......takes forever one square mile at a time with a tiny brush.
Since you will only see this up close from a plane in the MA, the illusion at a distance of the rock strata will make it look like a weathered rock strata pile like you see in some deserts with rotting rock outcrops. I've climbed on them in southern california out around the Antelope Valley area.