Umbra is Portuguese painter Cortesão’s fourth solo show with Carbon 12. Shadows, as the Latin title suggests, are complex denizens of these works, both discursively and materially. In Cortesão’s palette, shadow is a projection, beamed from some spectral world. A grey eeriness wafts through the forsaken interiors of the Passage series, as well as the cell-like confines of the Room works. Color, an occasional Cortesão obsession, has succumbed to a shadowy chill.