So far this problem is stumping even ITT technical support.  I have several hundred volumetric data arrays, each dimensioned: data1 = fltarr(320,320,320), data2 = fltarr(320,320,320), data3 = fltarr(320,320,320), etc... I've sucessfully been able to render a single one with iVolume: iVolume, data1, /auto_render Now, I'd like to render all my data arrays in a sequence (like movie frames) to animate my floatingpoint 3D results changing with each new data array.  Is this at all possible?  Thanks in advance for your help.