Figure 2. PTM-reconstructed view of a Marella specimen from the Burgess Shale, Middle Cambrian, British Columbia. 2.1. One virtual light source normal to shale surface. 2.2. Oblique virtual light source from SE, inverted image. This image can be regarded as a "traditional" film-based photographic image for comparison with the enhanced versions. 2.3. Specular enhancement. Note that color contrast is almost removed, whereas relief is enhanced. 2.4. Addition (overlaying) of image 2.2 and 2.3.

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