Collision Material Node add collision material data to the Grid.

Input / VDB Grid:
Input vdb data for simulation. You must connect this input for work.

Output / VDB Grid:
output result vdb data.

When checked, add sticky material.

Defines friction intensity of collision surface.

Friction Map:
When expose switch and connect map helper, multiply map intensity to friction.
And select map type “2D map” or “3D map”. For 2D map, you need to have UVW channel on input.