Onion Skinned Drop Shadows (21 May 2004)
Onion skinning refers to a technique in time-based arts of overlaying several frames in a sequence to discern the subtle differences between them. The animator is simply looking through a stack of layers to see one whole motion through a composite of its parts. What is opaque on one layer can be seen through the transparent areas on a layer above it. We can do the same thing with divs. Using CSS, we can stack divs together in concentric fashion, like the layers of an onion, to form a composite of anything we like. Today, we are making drop shadows.
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