Guys, I had a flight, over Melbourne ( Orbx AU blue ), with an 3rd party aircraft. Tried normal and dense scenery settings, and see no difference on FPS. I assume this is a good thing as in FSX, with same aircraft and scenery, I would lose around 10 FPS with dense over normal. Or, is something wrong with P3D scenery settings...

I think P3D has better memory management which allows for less tweaking.:)