The artist explained that the artwork didn't use Booleans and relied on procedural modeling and revealed that the node tree behind the cathedral generation contains 40,000 nodes. They are not all unique, as repeat zones and reusable node trees are unpacked in the count, but the number reflects the full scope of what it takes to procedurally generate the structure.

IRCSS generously shared the node setup here. It features not only the cathedral setup but also the large Geometry Nodes project of making the assets for a Northern European-style town, including houses, towers, bridges, town walls, and more.