Nilearn: how can you overlay additional statistical maps onto a surface plot?

Hey,

I am using nilearn to plot statistical maps onto a surface brain via ‘surface.vol_to_surf()’ and ’ plotting.plot_surf_stat_map()’. I would like to overlay another statistical map onto the same brain.

For slices of brain volumes, this is pretty easy using ’ display.add_overlay()’

Does anybody know how this could be accomplished on surface brains?

Kind regards,
Chris