We present a new method for real-time rendering of shadows in dynamic
scenes.  Our approach builds on the shadow map algorithm by attaching
geometric primitives that we call "smoothies" to the objects'
silhouettes.  The smoothies give rise to fake shadows that appear
qualitatively like soft shadows, without the cost of densely sampling
an area light source.  The soft shadow edges hide objectionable
aliasing artifacts that are noticeable with ordinary shadow maps.  Our
algorithm computes shadows efficiently in image space and maps well to
programmable graphics hardware.  We present results from several
example scenes rendered in real-time.