What it does
Keep solid ground only where all your input shapes are solid. Minimum takes the lowest density at each position, which lets a negative part of one input cut through the others.
Connect your terrain and a cave field to Inputs, keeping the cave field negative where you want air. To remove a shape that is positive inside, negate it first. Try Smooth Minimum if the cut needs a rounded rim.
On noise
The same noise before and after this node, seen from above.
In 3D
The same output in relief: each value becomes a height, coloured like the map above. Drag to look around.
Inputs and outputs
| Name | Type | Default | What it changes |
|---|---|---|---|
| Inputs | |||
| Inputs | Density | The densities to compare; any nonpositive input leaves air. Takes several, in order. | |
| Output | |||
| Output | Density | The lowest input value at each position. | |