SilverWook said:
I still can't think of a good reason why there couldn't have been at least one physical clone trooper costume made for the prequels.
Arrogance and just not giving a sh*t.
'Arrogance' because they proudly proclaim that you can't tell the difference on the commentary. Plus 'Not giving a sh*t' because deep down they knew that then they'd have to bother matching the look of the physical prop to the CGI fakery.
Same reason I believe R2 is matt in ROTS so they didn't have to bother doing time consuming reflections. Probably one of the reasons behind why Threepio in the PT was kept from being polished gold until his last scenes during ROTS.