Thanks a lot David. You're really helping me a lot. You are right. I could do it with a look-up table. -- View this message in context: http://vtk.1045678.n5.nabble.com/How-to-show-black-and-white-image-as-black-and-red-tp4778703p4799196.html Sent from the VTK - Users mailing list archive at Nabble.com.