You can do it already,
hiding the group pivot, hides all it's children, also culling them from any collision tests.
Function newGroup() return createpivot() end function function addEntity(group,entity) entityParent entity,group end function function GroupCollision(Group,Enable) if enable showEntity group else hideEntity group end function
hiding the group pivot, hides all it's children, also culling them from any collision tests.