nxConstraints - Collisions

A layer that provides particle to particle collisions, keeping particles from intersecting.

A dynamic spring is created between overlapping particles to push them apart. Add it from the + menu in the nxConstraints Layers list, then select the layer to show these settings.

The Collisions layer settings

Weight

Sets how much this layer contributes to the overall constraint solution. With a single layer this can be left at its default, 100%. When you combine collisions with other layers you can raise this above 100% to keep the collisions firm as the other layers blend in.

Stiffness

How stiff the collision is. In effect, a dynamic spring keeps the particles apart so they do not intersect. Higher values resist overlap more firmly. Defaults to 100%.

To stop particles bouncing endlessly off one another, add a Friction layer alongside the collisions.