Zitat

Photo-Based Scenery Add-On Update

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.