When trying to make airports using only the latest SDK tools that is almost impossible. The main reason for this is that the BGLComp XML format is much to restricted when it comes to making ground layouts. If you want to make something that looks more realistic than the default scenery it is not possible. So I would like to see the BGLComp XML format (or whatever we get in the future) to be more flexible. This way a lot of problems caused by using old techniques for airport design would be solved and it could also just make things easier. I would suggest at least the following items be added: More choices of surface texture type, the current set is to limit if you want to represent a real airport that can have different shades of concrete or a GA airport with specific tiles. Maybe even better would be to allow adding your own textures or else let users overwrite the default textures by placing a copy in the local texture folder of their project. Allow more control over the mapping of the texture, when making a concrete apron it should be possible to map the texture so that the tiles are in the right direction for example. Allow more flexibility when making markings. Now we only get yellow lines that are linked to the taxiway paths. For realistic airports we would also like to be able for example red safety or clearance lines, white tow lines, etc. And to be useful it should also be possible to draw just line segments, without them being linked to a taxiway or so. That way it would be possible to make realistic markings (that often have a much more complex shape than the taxiway path).