[Photos via, via] Explore Petra Cortright experiments with a combination of digital media, aluminum-based and silk works in her Blank Blank Blank exhibition. Check out the latest one-man show of L.A.-based graffiti pioneer Risk and see how he elevates the craft, bringing it from the streets to the walls of a gallery. Step into pro surfer Herbie Fletcher's world of waves in his Path Of a Wave Warrior at Known Gallery. It's all going down right here, right now, so plan your gallery and museum visits using our guide to this weekend's best L.A. art shows.