Geometry grouping and mergingGrouping objects togetherMerging multiple meshes into a single meshLoading geometries from external resourcesSaving and loading in Three.js JSON formatSaving and loading THREE.MeshSaving and loading a sceneWorking with BlenderInstalling the Three.js exporter in BlenderLoading and exporting a model from BlenderImporting from 3D file formatsThe OBJ and MTL formatsLoading a Collada modelLoading the STL, CTM, VTK, AWD, Assimp, VRML, and Babylon modelsShow proteins from Protein Data BankCreating a particle system from a PLY model