This week I worked on adding volume labels based on a Freesurfer anatomical segmentation file and plotting those files with an mne.viz.Brain object which operates in Freesurfer surface space and has lots of flexibility for 3D plotting. Next, it's developing the core GUI as much as possible until the end of GSoC and making it smooth and well tested. I'm not stuck on anything and it's been a good week for getting some PRs merged.