Yes, rivers are actually implemented already. The current method just simulates the erosion caused by running water in a very simplistic manner every N iterations due to performance reasons and the fact that plate tectonics have a completely different timescale than rivers. The final output could have rivers and lakes (and climate in general), but for now it's out of scope - platec is a topography generator, not a planet simulator. The effect of asteroid hits on the topography is neglible and therefore i have no interest in implementing them.
Comment