Figure 7.  PTM-reconstructed view (no enhancement) of trace fossils (Helminthoidichnites tenuis), positive hyporelief, Lower Cambrian Mickwitzia Sandstone, Västergötland, Sweden. SMNH X3528. After the complete file has finished downloading, a finite number of virtual light positions can be set by clicking and dragging on the image. QuickTime is required and available for download from Apple.