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Space-time blending (STB) is an established technique allowing to implement a metamorphosis operation between geometric shapes. In this paper we significantly extend the STB method to make it possible to deal with heterogeneous objects, which are volumetric objects with attributes representing their physical properties. The STB method, used for geometry transformation, is naturally combined with space-time transfinite interpolation, used for attribute (e.g. colour) transformation. Geometry anddoi:10.2312/egs.20201014 dblp:conf/eurographics/TereshinAPA20 fatcat:i7tk6ep46je65jir7xf5wzvfum