Procedural generation of cave-like tiles with cellular automata and Blender Geometry Nodes

In this article an algorithm for procedural generation of cave-like tiles is presented. The method uses simplified sketches as input, that can be either provided by the user in the form of black and white image, or automatically generated (with or without specified connections). The initial sketch is expanded using shapes generated by the Cellular Automata algorithm ensuring interesting shapes and connectivity of all cave system areas. The entire solution was implemented in Blender, with the Python script generating the system shape, and Geometry Nodes tools used for the visualization of final model.