This package contains 25 high-quality rocky terrain heightmaps designed for terrain creation and landscape generation.

LANDMASS PLUGIN SHOULD ACTIVE ! !

"change landscape z value for high mountains"

Step 1: Active landmass plugin

Step 2: Generate a landscape

Step 3: Enable edit layers in the Landscape's details panel

Step 4: open landscape panel

Step 5: drag the blueprints to the landscape

Here is a video about it