This morning's prompt was 'car accident', the day after teenagers...

Anyway, list of stuff I need to do with the square to diamond grid to sinusoidal world map (s2dg2swm):

1. Add back in jitter

2. Work on heights; each point is 0 to 1, then we subdivide six/three ways

3. Lazy flood fill instead of random walk!!! Based on target area

4. Rivers, up from the sea?