Interactive shadows (shadows that move as structures are moved) can be enabled in the Effects dialog or with the command set shadows. Click the image to show a small molecule rotating above a rectangular plane. This simple animation was made with the Chimera command script tumble.com. Interactive shadows also work with ribbons, surfaces, and other representations.

The image shows the structure of the human TRPA1 ion channel (wasabi receptor) determined by electron cryo-microscopy, Protein Data Bank entry 3j9p. The four subunits of the tetramer are shown as ribbons in different colors over a dark-to-light gradient background. (More samples...)