Is me again, just want to ask about the newer terrain feature.
I am visualisation the distributions of water aquifer's, therefore, some of the 3D primitives are displayed beneath the globe.
As a result I need to manually set an area (simple as a rectangular region) and demote that region to make a hole, so that the primitives can be seen.
And the other way is to set the surface transparent limited to that region.
Now I have noticed the terrain tutorial and its reference documentation, but it does not tell me much how am I going to create such effect manually.
Can anyone shed some light to this issue?