Questions about land in LE

[Yue]

What format is best for creating a terrain by importing a height map? (points for and against)

Something I can't implement in my game is canyon-shaped terrain, because it looks weird when you can't cast shadows from the terrain itself. So.

What's the best option to create a terrain, plane, dunes, for a terrain with a stone there, and another stone here?

And finally the more layers of textures for the terrain, the more performance can be affected?

 

[reepblue]

Try to use R16 and import it with the terrain editor. Then place your rocks with the vegetation system.