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Atoms supports blend shapes deformation. In order to use blend shapes during the simulation the blend shapes targets must be exported using the export mesh tool. The mesh exporter tool writes the blend shape data of each target (P, N, id and name) inside the mesh file. The variation builder automatically exports this data.
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For instance, if you added three blend shapes to the atoms robot head mesh ("robot1_head"), you would control them with the following double metadatas: "atomsRobot_robot1_head_0","atomsRobot_robot1_head_1", "atomsRobot_robot1_head_02". Please remember that the geometry name is not the mesh file name, but the name used inside the Variation manager.
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