Complex sentence: While he never achieved the stature of these two, his influence on their work was significant and Cézanne made his first attempt at etching based on one of Guillaumin's paintings of barges on the River Seine.
Split into simpler sentences: While he never achieved the stature of these two, his influence on their work was significant. Cézanne attempted his first etching based on a Guillaumin paintings of barges on the River Seine.