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...to file using rgl.postscript(), the background color changes to white. Can anyone tell me how I can avoid this problem? Example code: # Produces 3D graph with black background: scatter3d(X, Y, Z, bg="black") # Writes a file which has white background: rgl.postscript("c://test//test3D.eps", fmt="eps") Thanks in advance! Best regards, Vegard Andersen Institute of Community Medicine University of Tromso, Norway.