Computer slows down after volume is oversampled

Can try these steps in a blank scene:

  1. Load MRHead sample data.
  2. Go to segment Editor and click on segment geometry button, and from the Source Geometry drop down choose ‘MRHead’. Set the oversampling to 2. Do you see something like this?
    image
  3. Hit OK.
  4. Create a blank segment, and then threshold effect with 69.75-258.00 range and hit apply.
  5. Go to Segmentation Geometry again, and this time choose the segmentation as your source geometry. Confirm that you are seeing:
    image

This oversampling of 2 for MRhead should not cause any noticeable delay or lag on your computer at all. If these work out, try with your data.