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Hi Jess- > I changed the rendering threads in 2.7 to 1 and the problem does indeed > disappear. Well, then I guess I fixed it. ;-) In general, the VisAD Gridded*Set code is not thread safe and you should use the latest visad.jar or the 2.7u1 local-visad.jar in your distribution. I ran into the problem when sharing probe positions, so it's not limited to the spiky isosurface issue. Don > Unidata IDV Support wrote: > > Hi Jess- > > > > > >> We noticed a problem with some spiky isosurfaces (see attached image), > >> and as I've been testing, I noticed this problem in IDV 2.7, but not > >> 2.7u1. Can I assume you were aware of this problem? Could you let me > >> know what changes were made to fix this? > >> > > > > Try setting the rendering threads to 1 (in the User Preferences under > > Formats&Data tab) and see if the problem disappears in 2.7. If so, let me > > know. It could be that the changes I made to the Gridded*Set classes that > > were not thread safe fixed this problem. > > > > Don > > > > Ticket Details > > =================== > > Ticket ID: TDH-801441 > > Department: Support IDV > > Priority: Normal > > Status: Open > > > > > > Ticket Details =================== Ticket ID: TDH-801441 Department: Support IDV Priority: Normal Status: Open