Hi all, i'm trying to visualise the increase of a sphere when i change the radius in the same render, it 's like a moving actor, i tried Sleep() but i didn't get a result, can someone help me please? -- View this message in context: http://vtk.1045678.n5.nabble.com/moving-actor-tp4895490p4895490.html Sent from the VTK - Users mailing list archive at Nabble.com.