Imagine if all the cartoon and cereal box characters you grew up with became a grotesque nightmare of exaggerated Ren & Stimpy style. That sums up the work of Shawn G. Pacheco. The Bay Area illustrator renders the mascots of capitalism and children’s media — Ronald McDonald, Popeye, Papa Smurf, Barney — into comically repulsive monsters. Many of his acrylic paintings — which are now on view at FM Gallery (483 25th St., Oakland) in the show Broken Glass and Bubble Gum — feature the pruned texture and bright coloring of chewed bubble gum, with the dirty edge of broken glass. As unsavory as they are, Pacheco’s creations also achieve a playful, pop art kind of irresistibility by offering familiar images in intriguingly revitalized outfits. His execution is pleasingly consistent, standing out amid the abundance of delicately tactile Art Murmur exhibitions by offering the sheen of a well-finished illustration and the audacity to appreciate the vulgar.