Cube Counting Ambiguity

This applet requires Sun's Java VM 2 which your browser may perceive as a popup. Which it is not. If you want to see the applet work, visit Sun's website at http://www.java.com/en/download/index.jsp, download and install Java VM and enjoy the applet.

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This is a classic. Depending on a view point one may see either seven or eight cubes. Staring at the applet for a few seconds causes the view point to shift.

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