Just note one thing, there are two types of ground markings:
- The "visible" ones, the actual drawing that can bee seen in the scenery
- The "logical" ones, that only the AI engine uses, to know were to stop AI planes for holding short
If a scenery is done entirely with SDK techniques, and using AFCAD also for the visual parts, the two are the same, since the AFCAD will provide both AI logic AND visual appearance. You move the hold short zones in AFCAD, the AI will change their hold short position and the drawing will move as well.
But in our sceneries, as with most of the 3rd party addons, which use custom ground textures, the thing that one can adjust in AFCAD is only the logic part that drives the AI movements, the visual part is provided by the custom ground layers, and can't really be fixed so easily by the user: we'll have to do that.