Hi Allie, I couldn't find vtkRenderer::SetMultiSamples in the doc. However I've tried vtkOpenGLRenderWindow::SetMultiSamples and vtkOpenGLRenderWindow::SetGlobalMaximumNumberOfMultiSamples without having any luck. Are there other setup required besides setting the multi-sample size? Thanks, Chuan -- Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html