Certain highly-detailed scenery add-ons that make use of large satellite images may not display correctly in Flight Simulator X. Specifically, you’ll notice large rectangular areas that are black or dark blue, where the proper ground texture does not draw at all. Microsoft has confirmed this issue to be a bug in the Flight Simulator X terrain display engine. To resolve this issue, download and install the Flight Simulator X update for your language, linked below.
Ahh Cheers for that! Might just have to give it a go as I've noticed it with Horizon's VFR Photo scenery. I wonder if it'll cure the map-mode problem of making the UK appear like its mostly water!?!?! :think: