These reliefs were created from scans of real objects. The data from
the scanner was converted into reliefs using ArtRead or ArtPICZA.

lady.rlf was scanned with a 3d Scanners laser scanner (converted using ArtRead). 

dinosaur.rlf was scanned with a Roland PICZA scanner (converted using ArtPICZA).

The rest were scanned with a Renishaw Cyclone scanner (converted using ArtRead).