Hello I work to procedural generation when will be possible to desing own web of valleys and rivers. The work can replace common heightmaps in game. Principle are 4 blending maps which blend 4 tiles in 4 directs. I use 4 meshs for render to blend maps. All files are generated. Here I can see little how it will look in future. It is WIP. Seeds for gen of tiles: Ilustrative image: