For example, when placing focal points for the surface stimuli, it may be scientifically relevant to place them within the folds of the surface (plural sulci, sing. sulcus).
Currently, as the surface is folded, it is quite difficult to place a point inside the fold.
In principle, any surface UI should be able to show the surface folded and "exploded" like the following image
I'm registering this as an issue, so that we are aware of it, but it may be a challenge to do correctly, following algorithms in the literature that are used by software such as FreeSurfer.