Most procedural cave generators on Fab are built as standalone actors. They generate a cave, but they don’t integrate naturally with Unreal Engine’s PCG workflow.
SubTerra takes a different approach, Instead of building everything around a single actor, the entire generation pipeline is exposed as modular PCG nodes.
You can use the complete cave generator, or combine individual nodes with the rest of your existing PCG graph to build your own procedural workflows, the result is a cave generator that feels like a natural extension of Unreal Engine rather than a separate tool.
The plugin also focuses on producing caves that are practical for gameplay, not just visually interesting, every generated layout is fully connected, supports multiple elevation levels through walkable ramps, and produces organic rock formations instead of smooth metaball-style tunnels.
Once the cave is generated, its surface is automatically classified into Floor, Wall, and Ceiling PCG points, making it easy to populate the environment with your own assets using Unreal’s existing PCG tools.
