Complex sentence: After 1920 Benson turned increasingly to the depiction of landscapes featuring wildlife, an outgrowth of his interest in hunting and fishing, from then on producing a steady and profitable output of etchings and watercolors in this vein.
Split into simpler sentences: After 1920 Benson turned increasingly to the depiction of landscapes featuring wildlife, an outgrowth of his interest in hunting and fishing. He went on to produce a steady and profitable output of etchings and watercolors in this vein.