Select Webcam

Click on to the left of "Record from:". You should see the panel expanded.

Select a second webcam in the combo box next to the "Right", and select the check mark.

You will see the video from the two webcams are combined into one. Red filter is applied to the left webcam, and cyan is applied to the right one.

Now, put on the 3D glasses. Adjust the positions of the two webcams so the image looks 3D.

You can put on your 3D glasses to see the 3D effect of the above screenshot.