to be fair, the scale problem demongort is talking about is the result of outdated shaders/bump effect and the generally lower mesh detail of the map in dcs simulations.
look at the screenshot of the ship he posted. the wave effect on the water is much too large in comparison to the ship, hence why it looks like an rc boat, as he puts it. this is a valid complaint.
if the shadows we see in edge are shader based, we may be approaching the kind of detail that would provide adequate scale. but looking at the screenshots, i do have my doubts still. the mountains cast shadows, but the ground is still rather flat and undetailed.
how other sims deal with this is with layered normal maps. if you get close to the ground, a noisy, procedurally generated normal map layer shows up, if you fly high, the large scale normal map created from height data is used instead. these layered shader effects provide a sense of undulation and unevenness to the otherwise smooth and flat terrain geometry.