The Trial version is exactly like the full version so, you'll not see any difference, when purchasing.
KDFW it's a *different* scenery than everything else on the market, and very different fom our previous ones. Different, also, in the fact that it runs faster and looks better.
However, there are some specifics:
- Runway lights and PAPIs had to be made custom so, they are not the standard FSX type. Which means, yes, the'll not be rounded when seen from a side because, for obvious performance reasons, they ARE thin blocks! However, note that in reality, you wouldn't be able to see much of the runway lights from the side, because they are directional so, it's not that unrealistic.
- The ground is made in a very different way, which is what gives the scenery that performance edge (it would have been probably *half* the fps, if it was done in a traditional way, and it would looked far more blurred), but there might be some unusual effect on the ground, like the progressive line not appearing everywhere.
In any case, to know if your problems are to be expected and by design OR you also ALSO having issues like conflicting sceneries, mesh, etc., it might be useful if you could post a screenshot, possibly with lat/lon coordinates visible so, at least we can check if what you see it's how the scenery is supposed to look like (considering how it's done), or you are having another problem.