  Given recipe of qualitative, kinetic modelling by geometric methods of
three-dimensional dendritic crystals. Characteristic features of the
perturbations appearing on the surface of a spherical body, leading to
different scenarios of the same equilibrium shape receiving of the same of
crystal, are established. Fulfilled computer embodiment of such dendritic
crystals which are growing both in conditions without convective flow and in
the oncoming flow of liquid. Special attention is paid to topological
characteristics of models with non-crystallographic point groups of symmetry.
Surfaces of various genus, including 270, were investigated.
