Procedural Terrain Generator Addon for Blender - Low Poly Terrain Generator
Why do my rivers look flat?
Try increasing the river depth or width. You can also reduce the overall terrain height to make the carved river channels more visible.
Why is no water appearing in my terrain?
Make sure the Water option is enabled and that the water level is set above the lowest part of the terrain.
Why do sliders feel slow when I drag them?
Try lowering the terrain resolution. Heightfields grow with the square of the resolution, so higher settings require more processing power.