Colormapping for visualizing geometric error. (a) Rainbow colormapping is frequently used to characterize scalar fields and can make prominent errors, such as unsegmented filaments, easy to identify. (b) Blackbody radiation has been shown to provide a better perceptual indication of varying scalar fields, however this mapping often obscures shading, which provides context for three-dimensional structure. (c) Isoluminant shading overcomes these problems at the expense of lower dynamic range. (d) A diverging color (default) maps from cool to warm hues, providing higher dynamic range without obscuring shading.