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I've upgraded to MMa version 10.4.1 under MacOS 10.11.4 on a MBP Retina. We use Image3D a lot in our work and it seems like it has gotten very very slow in this update. Indeed the whole MacOS UI will 'seize' (cursor disappears, machine is non-responsive) if I do things like change an expression that renders an Image3D, leading to its 'deactivation' in the notebook.

In the past, I've been able to interactively rotate, plane-cut, etc things like this

Import["ExampleData/CTengine.tiff", "Image3D"]

pretty easily. It's not 'speedy' by any means, but certainly not as bad as I feel like it is now.

Has anyone else experienced this phenomena?

(NB- this is on a relatively 'clean' MacOS install, graphics card / energy saving set to use the nvidia card, etc.)

Edit -- I put a notebook with a very simple volume of 16^3 of a sphere, on Dropbox here https://dl.dropboxusercontent.com/u/19616/painfulrotation.nb

This was very responsive in the past.

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    $\begingroup$ This maybe related. $\endgroup$ Apr 19, 2016 at 15:34
  • $\begingroup$ Do you have an example that was relatively speedy and is now noticeably slow? The given example seems to always have been quite slow. $\endgroup$
    – Stefan R
    Apr 19, 2016 at 15:50
  • $\begingroup$ Ill dig one up that is simple. Most of our stuff is result of a bunch of otherwise annoying computations :) $\endgroup$
    – flip
    Apr 19, 2016 at 16:02
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    $\begingroup$ Do you see any improvement with SetOptions[$FrontEnd, "RenderingOptions" -> {"HardwareAntialiasingQuality" -> 0.}] ? $\endgroup$
    – ilian
    Apr 19, 2016 at 16:18
  • $\begingroup$ @StefanR I put a DB link w/ a super simple rendered volume that, before, was very responsive. $\endgroup$
    – flip
    Apr 19, 2016 at 16:45

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