Mostly just leaving some feedback.
Enabling VT cuts framerate/ms by around 20fps on kitedemo. This seems to be because of the increased number of draw calls.
Likewise, implementing VT with 8k textures on a 2km landscape provided only a loss of performance. And quality obviously, since there is no virtual texture tessellation yet.
As a result, I dont think it’s a generally good idea to implement any of this in a working project just yet. Maybe once the links get worked out, and If the performance stops dropping on the final scenes.
It would have to really just be the same performance or better then not using it, and a frame loss of 20fps to draw calls is pretty prohibitive.