Complex sentence: He had the ability to reject or accept concept drawings for "Last Order"; as a result, Nomura had a large quantity of images redrawn, to the extent where "the entire production was in jeopardy".
Split into simpler sentences: He had the ability to reject or accept concept drawings for "Last Order". As a result, Nomura had a large quantity of images redrawn, to the extent where "the entire production was in jeopardy".