http://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/fieldsDef.html#SFVec4dAndMFVec4d has " The SFVec4d field or event specifies a three-dimensional (3D) homogeneous vector." as a first sentence. Should this instead say " The SFVec4d field or event specifies a four-dimensional (4D) homogeneous vector." ? Andreas