This video shows how to apply ParaView's Tetrahedralize filter to do volume rendering of a 3D dataset consisting of scalar values. The view is refined by using the Color Editor to customize the color and opacity settings of the filter. A different visualization is obtained by inserting a ProcessIDScalars filter into the pipeline, then using it to color different parts of an isosurface. This proves that ParaView is using 2 cores to process the data, in accordance with the application's settings.