[FieldTrip] tips for nice sourceplot using 'ortho'

[Vitoria Piai]

Hi all,

Does anyone have some tips for getting a nice sourceplot using the 
'ortho' method?
I'm using functional data masked by the stats results. I see a lot of 
cerebellum activity as well as deeper sources, so a surface plot is very 
likely to be fooling me. I'm getting a very ugly figure, though, because 
of all the squares (activity and masks) bleeding outside of the skull 
outline.
Anyone with experience on what works well to make that look nicer (eg., 
in Illustrator)?

Thanks, Vitoria