Hi Signy,
Maybe the pixilation is due to having larger voxels in the overlay,
relative to those in the underlay. If the anatomical underlay is
1x1x1 and the overlay is 3x3x3, it will look pixilated. Is that
what is happening?
Note that smoothing the display of larger voxels may mislead people
about the data. Having said that, if you do want to resample the
overlay to be more like the underlay:
Define Datamode -> Warp OLay and Demand
and then set the Olay and Stat (Thresh) resam mode to Li or Cu
(linear or cubic).
Is this what you were picturing?
- rick