Robert Lamb was a staffer at Filmation back in the 80s, where among other things, he worked on the Masters of the Universe cartoon. Decades later, he’s rescued quite a few old storyboard drawings from the series.
One of the joys and privileges I had during my time at Filmation was checking out what artists in other departments were creating. I especially sought out the background painters and layout artists, marveling at their work. One day after work, I spied blue pencil drawings sticking out of a folder lying in the open dumpster next to my car. After a quick check for possible witnesses, I dove in and retrieved a treasure of 1st season Masters of the Universe background layouts.
You can see his entire collection here