Why doesn't my Landscape Grass Type produce grass?

Layer weight at the queried position is zero or Density is too low. Paint the grass-bound layer at full weight; set Density Per 10x10m to 400+; verify Cull Distance is large enough.

Where do I bind the Grass Type to a layer?

Landscape Material → LandscapeGrass output node, with Grass Type referencing your asset and Grass Variety per landscape layer.

Performance considerations?

Grass auto-LODs by distance. Tune Cull Distance per Variety; lower distances trade visible grass for fps.

Fix: Unreal Grass Type On Landscape Doesn't Spawn

Quick answer: Paint the grass-driving landscape layer to weight 1. Grass Type Density 400+. Cull Distance > visible camera reach.

Tutorial says drop a Grass Type into the landscape material. You do. No grass. The driving landscape layer was never painted, so weight = 0 and no instances spawn.

The Fix

Landscape Material:
  Output: Landscape Grass
    Grass Type:   GT_Grass.GrassType
    Grass Variety entry:
      Grass Mesh:                 SM_GrassPatch
      Grass Density (per 10m²): 400
      Place In Shadow:            true

Landscape Layers:
  Layer_Grass:
    Paint at full weight in vegetated regions

Grass settings:
  Cull Distance Min/Max:    0 / 5000

Density is per 10×10m square. 400 = roughly 4 instances per m². Cull Distance bounds visibility. Layer paint drives where grass appears.

Verifying

Paint the grass layer in a region. Stand within Cull Distance. Grass appears. Walk away beyond Cull Distance Max: it culls.

“Layer painted. Density up. Cull generous. Grass grows.”

Related Issues

For foliage HISM, see HISM lighting. For foliage paint tool, see paint tool.

Layer paint. Density. Distance. Grass.