A method and apparatus programmatically define structure within a physical modeling environment. The coating agent provides photoreactive groups adapted to attach the agent to the surface, as well as photoreactive groups adapted to remain unattached to the surface, and thus serve as photoinitiators for the activation of polymerizable compounds in order to form a polymer layer thereon. A reset station automatically resets the pockets to the set height. The method for disassembly of the display instrument is based on pressing the connector element out of the housing recess andor the disc recess.