Complex sentence: His contributions to the arts have gained him the reputation of being one of the world's best figure makers, where his Bighead mechanical sculptures have been commissioned by international performers and can be found in collections around the world.
Split into simpler sentences: His contributions to the arts have gained him the reputation of being one of the world's best figure makers, with his Bighead mechanical sculptures. His pieces have been commissioned by international performers and can be found in collections around the world.