Before and after comparisons

A discussion on one of the Alamo forums concerned comparing a 3D rendered scene of an historical model with the same scene today.  I decided to construct a web-based viewer in which two images are superimposed with a slider controlling the width of the top image allowing the bottom image to be revealed.

The solution is a combination of html and javascript.  I posted a test on one of my Azure websites:

Low Barracks and Lunette.


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