Swamp pop painter Francis X. Pavy makes art you can dance to. Born on the bayous of southwest Louisiana, his one-man-band of amplified visuals reach out and grab you like the seeing-eye hands of his "Medium Voodoo." In "Drinking Muddy Water"—the seminal piece in a recent series that alludes to the late, great bluesman—colors crackle out of a gumbo of Mississippi mud and spawn a river flow of images: vortexes spin a zydeco two-step across a hoodoo honky-tonk where guitars sprout eyes and you c...