Hi Elvis, I tested it on my nvidia geforce gtx 770 with 4GB of vram and I have the same problem. With the larger dataset the volume is not rendered. Best regard Robert -- View this message in context: http://vtk.1045678.n5.nabble.com/Volume-rendering-problem-tp5739662p5739681.html Sent from the VTK - Users mailing list archive at Nabble.com.