Maybe they forgot to do large scale test because a demo with landscape spline roads is obviously made with large maps in mind.
I tryied it with world composition and 25200*25200 tiles. I have to assign the runtime virtual texture asset to each landscape streaming proxy but:
- If I assign the RVT volume to the landscape component (in the persistant level) I get the same low quality than in previous screenshot
- If I assign one RVT volume per landscape streaming proxy (ie tiles) the quality is higher (not as good as original landscape material but at least usable) but only one tile look and other tiles has a lot of glitches