Missing landforms

[L1011-500 0]

https://imgur.com/kZuGItH

Anyone knows what is the white lines about, because I am pretty sure that some terrain is missing inside the white lines.

The location is Hong Kong by the way, the only add on I have for Hong Kong is FlyTampa KaiTak

[downscc 1,327]

Hard to tell but is it possible the missing terrain is actually missing textures?  I have several FlyTampa locations where I had to turn off their landclass files to fix missing or wrong terrain textures.  I don't have VHHX, but I've had to do it at YSSY and CYUL.

[Benjamin J 751]

What you’re seeing is coast lines I think, there supposed to be land within but it appears to be missing for you. Not sure where to begin troubleshooting... though what sceneries might you have installed that effect this area?

[MDFlier 2,031]

I would think that a "normal" elevation issue might cause islands to be sitting lower in the water so you're only seeing the higher parts of them.

Maybe its a mesh, Vector, or library order problem?