====== Wilbur Erosion Tutorial ======

[[:tools|PMC Editing Wiki: Tools]], [[tools:wilbur|Wilbur]]

HOWTO generate erosion to your heightmap.

  - Filter -> Noise -> Fractal Noise, ridged multifractal, operation: replace, H: 1, amplitude: 1, lacunarity: 1.9, displacement: -10, octaves: 7, XY scale: 2 and other box 2, offset: 1, XY origin: -10 and other box -10, fgain: 2, seed: click random button
  - Filter -> Fill -> Fill Basins (CTRL-B), use default -1 value
  - Filter -> Mathematical -> Span, Low = -60, High = 1000
  - Filter -> Noise -> Percentage Noise, 5% (5% is very very rough, too rough! suggest you try smaller values or add some blur later)
  - Filter -> Fill -> Fill Basins (CTRL-B), use default -1 value
  - Choose incise flow or fluvial erosion first pass, see below
  - Filter -> Fill -> Fill Basins (CTRL-B), use default -1 value
  - Choose incise flow or fluvial erosion second pass, see below

That makes quite nice looking eroded terrain.