Since 1998 Driessens & Verstappen have made several transformation sequences by using physical and chemical processes. The resulting form collections (Morphoteques) show step by step transitions from daily objects to their unrecognizable final state:

In Morphoteque #10 (1998) the force of pressure and elasticity was used.

Morphoteque #11 (2001) the process of erosion.

Morphoteque #13 (2003) was created by galvanization and etching.

Morphoteque #14 (2004) by dehydration and fermentation.

In 2019 the process of erosion got renewed attention during a residency at DordtYart, resulting in Fading Souvenirs, a performative installation of 4 rotating tumblers in which souvenirs are ground by stones and water.