Fast and Gorgeous Erosion Filter
Summary
Rune Skovbo Johansen presents a fast, GPU-friendly erosion filter for terrain that uses per-cell pivoted stripe patterns to create branching gullies and ridges. The post details a gradient-based approach with rotating stripes, octave-based erosion, and methods to preserve peaks while enabling crisp valleys, plus normalization and drainage visualizations. It also references Shadertoy shader work and Phacelle Noise as related innovations.