Step

1. Create the river layout with spline tool and adjust the layout with your needs

1. Drag the terrain HDA into the map

1. Define the area for the city with a box, and this area will be generated flatly

1. Set the Houdini Inputs as World Outliner Input and feed the spline tool and the box to the HDA

• Caution: each modification might take 20 - 60 seconds to update

1. Changeable parameters:
   1. Map Procedural Info - General info for the landscape
      1. Scale - scale factor for the mountain part
      2. Offset and Frequency - act as a random seed for the map generation
      3. Curve - define the threshold for the generation
   2. Materials
   3. River
      1. depth
      2. Width
      3. Noise Amplitude
      4. Noise Element Size
      5. River Noise Segment Length - define the level of details for the river
      6. Lacunarity
      7. Roughness

1. Refine the mesh & Bake the terrain

1. Rescale the baked static mesh (1000 for this project) and apply textures