Two members of Moira Scar — LuLu Gamma Ray and Roxy Monoxide — also perform as V.E.X., Ventriloquest Ectoplasmold Xanaxax, a mouthful of a band name that’s as inscrutable as the music these Oakland artists produce. Descriptions of Moira Scar are similarly over the top, noting the outfit’s debts to death rock, goth, psychedelic, and industrial, along with some cosmic or pseudo-scientific terminology for emphasis. Soberly, Moira Scar, which is performing at the Hemlock (1131 Polk St., San Francisco) Saturday, sets noisy scree and dramatic vocals atop rollicking low-end grooves. It sounds gloomy, unnerved, and a tad cracked, but Moira Scar’s live show, fraught with outlandish stage decor and visual projections, reinforces the group’s overall garish, sci-fi garbage aesthetic. It’s campy — unabashed and loud — executed with enough conviction to infect even the most stoic listeners. It’s hard not to stagger away from a Moira Scar show without sputtering nonsense in the futile hope of rationalizing the experience.