Art Review Cartoony geometrics, 3-D ‘paintings’ stand out at the deCordova Biennial ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page Barry Chin/Globe Staff The deCordova Biennial’s showstopper: Hamra Abbas’s riveting “Kaaba Pictures” series. Barry Chin/Globe Staff Archival pigment prints of photographs, Abbas’s series looks like paintings — cartoony geometries with architectural and ornamental flourishes. Barry Chin/Globe Staff The series depicts the Kaaba, the black granite cube of a building, destination point of the pilgrimage to Mecca, said to be built by the Prophet Abraham. Barry Chin/Globe Staff Lynne Harlow’s “So I Built a Raft,” an enclosed curtain of Day-Glo green ribbons that riffle on the breeze and glow beneath magenta lights. Barry Chin/Globe Staff Other strong pieces don’t rely on color. Jilaine Jones’s “Wonder World,” a fleet and airy concrete and steel abstract sculpture.