1. Erosion and Weathering
CS 658

2. Still in the Classics
Musgrave 89 is one of the first process-oriented approaches.
There are others.

3. Hydraulic Erosion (Musgrave)wv Δw sv wu su av au v u v u
How much water to transfer between cells?
Musgrave, Kolb and Mace “The Synthesis and Rendering of Eroded Fractal Terrains” SIGGRAPH 89

4. Hydraulic Erosion (Musgrave)wv Δw wu sv su
Still water
Moving water
How much sediment is deposited and how much becomes permanent?
Musgrave, Kolb and Mace “The Synthesis and Rendering of Eroded Fractal Terrains” SIGGRAPH 89

5. Hydraulic Erosion (Musgrave)wv Δw wu sv su
Still water
Moving water
How much sediment is deposited and how much becomes permanent?
Musgrave, Kolb and Mace “The Synthesis and Rendering of Eroded Fractal Terrains” SIGGRAPH 89

6. Hydraulic Erosion (Musgrave)
Musgrave, Kolb and Mace “The Synthesis and Rendering of Eroded Fractal Terrains” SIGGRAPH 89

7. Thermal Weathering
Musgrave, Kolb and Mace “The Synthesis and Rendering of Eroded Fractal Terrains” SIGGRAPH 89

8. Musgrave, Kolb and Mace “The Synthesis and Rendering of Eroded Fractal Terrains” SIGGRAPH 89

9. Variable Roughness Mountain tops tend to be jaggy.
Valley floors tend to be smooth.
How can you get that with midpoint displacement?