Step 1—the design of a concrete semantic representation of 3D content (CrR) provides particular elements of 3D content(contentcomponentsandcontentproperties)toenablerepresentationofdomain-specificconcepts(classesand properties) that will be further used in Step 3. The result of this step is a knowledge base compliant with the MultilayeredSemanticContentModel(ML-SCM–proposedin12). ACrRincorporatesconcretesemanticcomponentsand properties, which are specific to 3D content (cf. Sec. 3/1), e.g., meshes, groups of objects, materials, viewpoints, etc. Hence, this step is typically performed by a developer with expertise in 3D modelling, who is equipped with specific tools, e.g., 2D or 3D graphical editors for creating textures or meshes.