Try re-setting your axis. It may be that part of the image is just cutoff and that’s why it looks weird.
You can get your axis limits by plotting all three slices in a separate figure and typing
V = axis
Go back to your 3D scene viewer and type this into the command window:
resultfig = get(gcf); % Check that your current figure is correct if ~isempty(strfind(resultfig.Name,'Electrode-Scene')) axis(V) % re-set your axis end
Hopefully that will fix it. Let me know if you have any problems.