Well I noticed in metal maps I tend to get the "send/dont send" error report and it crashes the game. sometimes this happens mid-game and sometimes right after loading the map.
Well in the current state, aircrafts are rather sucky looking, they're all jittery when the height map goes bumpy. Is there any way to make them fly smoothly? I personally think that rather than using the ground or water (depending which is closer as you said) Maybe only have a set flat value? I personally think water should be the only thing aircrafts use, though this may cause issues with maps with no water. Perhaps an average height should be calculated based on the hieghtmap. What I mean is like, take the heightmap image, average out the shades (colours whatever) to have one shade (likely going to be pure grey but it depends on the heightmap, like the average of a hieghtmap that is mostly black will be a very dark grey, while if the heightmap is mostly white then the average would be a light grey)
Is there a way to have this done to heightmaps pre-game, whilst loading the map? Of course only aircrafts would use this and it would not be visible, and it would have to only be used while the aircraft is in flight. The second they take off from ground they use that average as it's set ground value. If this is too complicated I can show in images what I mean but I'm sure I made that clear.