This paper reports on investigations on the possible advantage of the coupling between genomes and physics of cells in artificial evolution. The idea is simple: evolution can rely on physical processes during development allowing to produce shapes without need to specify how exactly this shaping has to be done. Evolving a minimal energy surface such as soap bubbles would need only the specification of the boundary values and a homogenous interaction pattern between the cells. This paper shows that it is possible to link a genetic regulatory network to physics during development, that a reduction of parameters is indeed possible and that the understanding of what is going on in such a system is relatively easy to gain.