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/usr/share/dx/samples/scripts/Sequencer is in dxsamples 4.4.0-1.

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macro do_each_frame(frame)
{
   isovalue = frame*.05;
   isosurface = Isosurface(data,isovalue);
   Display(isosurface,camera);
}

data = Import("cloudwater");
camera = AutoCamera(data);
@startframe = 1;
@endframe = 5;
@nextframe = @startframe;
sequence do_each_frame(@frame);
play;