The central character in any good Star Trek is the starship, and the USS Enterprise is the most beautiful one in science fiction. The design is unique and immediately recognizable. Anyone can draw the Enterprise with just five straight lines and a circle. Matt Jefferies, the original ship designer, got a chance to upgrade his greatest creation, but it was lost when Star Trek: Phase II became The Motion Picture. Andrew Probert's Enterprise Refit design is considered a franchise-best, perhaps because he ultimately didn't veer too far from the original.
Source：https://www.cbr.com/matt-jefferies-final-uss-enterprise-design-was-lost-when-phase-ii-fell-apart/
