Hmm... actually, alpha being turned on does not seem to be necessary for this. Steps to reproduce:

- open AFNI [viewer A]
- open a second viewer window [viewer B]
- overlay the same dataset in both viewers (the underlays can differ)
- turn on clusterize in [ B] (and set thresholds such that this causes some clusters to disappear)
- click the blue location slider in [B.something] [this causes small clusters to reappear in that window]
- click the blue location slider in [B.something else] [this causes small clusters to disappear in the first window, but appear in this one]
- click the blue location slider in [A.something] [this causes small clusters to disappear]
- turn on threshold-as-alpha in [A]
- click the blue location slider in [A.something] [this has no effect on outlines, but applies clusterize approximately(!) to the color overlay]
- click the blue location slider in [A.something else] [this moves the effect to the new window]
- select a different overlay in one of the windows [this fixes everything]



Edited 1 time(s). Last edit at 12/15/2014 02:42PM by Isaac Schwabacher.