Using the Pochade.

The paintbox when closed measures 13 3/8"x10 1/4"x3 3/4" and fits in to a day rucksack along with my lunch and sketch book etc. The whole setup is light enough to hike with.
Here are a couple of photos of the setup being used in the field as envisioned when I first thought the box out.

I hadn’t thought to use the box for portraits but the small size of boards (9"x12") lends its self to quick headshots from life at our local open portrait session which is two hours.