A DECADE AGO, painter Cameron Martin abandoned full-bleed compositions and the “inherent illusionism” (as he explained it at the time) of motifs that spread edge to edge across the support. He began to bracket selected details of his source images—natural environments appropriated from found photos and his own snapshots—within increasingly emphatic framing devices. The paintings remain recognizable as landscapes, if mediated by redoubled borders and geometric overlays. Their blanched geographies, rendered in gray scale, are cropped, as if to emphasize the genre’s ever-encroaching gaze, its wanton