Sorry, I forget to tell my test data and environment. My OS is Win7. My data is 512x512x599. -- View this message in context: http://vtk.1045678.n5.nabble.com/failed-at-glTexImage2D-1-OpenGL-errors-detected-tp5734217p5734233.html Sent from the VTK - Users mailing list archive at Nabble.com.