The glowing fluid is a by product of illuminating the interior of the jar with reflected light. The tabletop is lit by shop lights on both sides. Light passes into the jar and gets bounced off a circle of white paper sitting under the jar and a rectangle behind it. I stumbled across the idea trying to get decent shots of specimens floating in fluid.
If you like it, the specimen is currently on Ebay .
This article originally appeared at Propnomicon.
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