Complex sentence: In the early years of his studio career, his work shifted entirely away from blown and fired glass; soonafter, he began working exclusively in cold sculpture, primarily creating sculptures made of glass and stainless steal.
Split into simpler sentences: In the early years of his studio career, his work shifted entirely away from blown and fired glass. Soon after this departure, he began working exclusively in cold sculpture, primarily creating sculptures made of glass and stainless steal.