Aubert, FabriceBechmann, Dominique2015-02-152015-02-1519971467-8659https://doi.org/10.1111/1467-8659.00142This article presents the properties of animation with space-time objects. A space-time object means here a geometrical object embedded in R4 with a volumic topology. Resulting animations are obtained by deforming space-time objects with a free-form deformation model. In this way topological modifications, such as disconnecting or hole making, as well as classical geometrical modifications, can be created in an animated object.10.1111/1467-8659.00142C57-C66