Boundaries node controls instances near surface or shape edges.

Boundaries node has a shape node input for extra zoning via shape area.

Invert shape inverts shape sides where instances are allowed to be placed.

Min distance sets closest possible instances distance to surfaces or shape edges.

Max distance set maximum possible instances distance to surfaces or shape edges.

Boundary scale controls instances size near surfaces or shape edges.

Boundary rotation controls instances rotatation toward surfaces or shape edges.

All instances distances to surfaces or shape edges are depends on collision radiuses of instances.