Recently an archive of rare pre-production artwork for the anime shows Genesis Climber MOSPEADA (機甲創世記モスピーダ) and The Super Dimension Cavalry Southern Cross (超時空騎団サザンクロス) has been uncovered and released on the net by Roger Harkavy. These are the shows that were cobbled together to form the last part of Robotech here in the U. S. It's really a treasure trove of material, and a great glimpse into the creative precess behind an sf TV show.
One of the most interesting things to me is that Southern Cross was originally conceived as a "Science Fiction Sengoku Saga" that starred high-tech samurai.
You can download a PDF of the Imai Files here. [via AltJapan]