Hi vtkUsers, I'm using two vtkrenderers, but when i move the mouse over there's only move one renderers and i need move the two renderers at the same time. Regards, Max Institute for Innovation in Minning and Metalurgy Phone: 56+72+295837 Fax: 56+72+295885 E-mail: msala012 at codelco.cl E-mail: mcsalas at chilesat.net