Mouse continued to produce album cover art and other music-related graphics through the 1980s. Early in the decade, he moved to New Mexico where he began producing fine art in a variety of media. In 1993, he required a liver transplant. Mouse's liver transplant was paid for by the State of California, not the Grateful Dead as is commonly thought. That money raised for Mouse's liver transplant was stolen at the benefit concert. In 1999, he contributed a portrait of Skip Spence to the tribute album, "", being a collection of cover versions of songs by the co-founder of Moby Grape performed by such artists as Beck, Tom Waits and Robert Plant.