3 hours ago, Denco said:

Between the two, which one do you personally recommend?

I ALWAYS recommend using options on the options screens over editing configs. I don't have any (manual) edit in my P3D cfg's.

EDIT: In case you meant if I would recommend 9 or 10: I don't use the option at all. I can hardly see the difference. 10 isn't worth the extra loading time imho and 9 isn't worth it either because I can only (and hardly) see the difference when I closely compare screenshots or use a very high zoom. But I have a 1080 monitor: maybe the difference is more obvious at 4K.

10 hours ago, GSalden said:

Feature off = 256x256 ground texture

Feature on = 1024x1024 ground texturen

Grond texture size in FSX : 1024x1024

Ground texture size in Fs2004 : 256x256

I was stunned to read from LM that P3Dv4  uses a lower ground texture resolution by default than FSX.  Surely to improve the framerate ..

If you check this feature than P3Dv4 performs less ( depending on your system ) and it might be even less than FSX ( SE ) ...

http://www.prepar3d.com/forum/viewtopic.php?f=6312&t=126479

I am getting more and more confused. What does ground texture size have to do with LOD_RADIUS?

Ground Texture size = amount of pixels of the texture ( sharpness )

LOD radius = determines the size of the coverage area to be refreshed around the aircraft. A higher value = wider & clearer coverage

5 hours ago, GSalden said:

Ground Texture size = amount of pixels of the texture ( sharpness )

LOD radius = determines the size of the coverage area to be refreshed around the aircraft. A higher value = wider & clearer coverage

So how can the increase of ground texture size increase LOD radius? It seems the opposite.

7 hours ago, dongdongliushui said:

So how can the increase of ground texture size increase LOD radius? It seems the opposite.

The LOD radius is a ring around your aircraft. Inside that ring it shows the highest ground texture size you have set , normally 256x256. Outside this ring all other ground textures are shown at a way lower resolution.

If you increase the LOD radius you increase the ring around the aircraft.

The ground texture size shows the sharpness of the ground texture inside the ring ..

1 hour ago, GSalden said:

The LOD radius is a ring around your aircraft. Inside that ring it shows the highest ground texture size you have set , normally 256x256. Outside this ring all other ground textures are shown at a way lower resolution.

If you increase the LOD radius you increase the ring around the aircraft.

The ground texture size shows the sharpness of the ground texture inside the ring ..

Thanks! I am getting it.

I just tried the same scene in FSX using LOD_RADIUS=10. Everything is crystal clear, far and near. There is no sudden pop up of clear texture or more accurate DEM. Amazing! I just don't understand why P3D is not as good as the old FSX as regards ground texture.