The Burton designer and Iskra Print Collective fixture returns with “Moods,” his second solo show at Burlington’s Karma Bird House. This time, he brings his signature rounded, leisure-minded humanoids out of print and into the realm of so-called “fine” art with large-scale paintings. These canvases remain consistent with Tupper’s poppy, graphic style, but reveal new experimentation with depth and dimension that gives them an almost diorama-like quality.