These connections are calculated dynamically, throughout the scene.

If two particles come within the Radius setting, at any time, a connection will be made.

Distance tab menu.

Connect Within Distance

If this is enabled, connections will be made between particles within the distance specified in the Radius setting.

xpConstraints_Connections_Distance_Connect Within Distance_v01.mp4

This animation demonstrates the effect of enabling the Connect Within Distance parameter, with particles connecting when they are within the 12cm Radius value.

Only Same Group

Connections will only be made between particles in the same group.

Weight

As with the Birth tab, this setting alters the influence each constraint type provides to the overall solution.

Connection Limit

This is a limit on the number of connections each particle can make.

Keep this as low as possible, as too many connections can dramatically slowdown playback in the scene.

Radius