Use the Ideal Depolarizer node to reinitialize the Stokes parameters so that the outgoing ray is completely unpolarized. Add this node from the Optical Devices submenu when ray intensity or power is solved for in the model. The Accumulator (Boundary) subnode is available from the context menu (right-click the parent node) or from the Physics toolbar, Attributes menu.

This section is available if an Auxiliary Dependent Variable has been added to the model.