Board Thread:Speculation House/@comment-27404492-20170511131216/@comment-28522425-20170617222244

Nikoli the rebel wrote: @Someone

You are right about Emerald not knowing but there is a principle in video games that applies here.

As graphics improve, the designs become more intracate. When they do change it is assumed by audience and developers that the designs were always that intricate to the people in universe but the software and technical capablities lead to a warped presentation to the audience.

When the Reds and Blues looked totally different in season 11 the audience is supposed to believe they always looked like that. Even when Master Chief got a huge redesign that looked nothing like the last incarnation, between Halo 3 and Halo 4, the developers still stated "His armor always looked like that."

Adding in the fact that Poser and Maya share a lot of technical aspects with cutscenes and RT's extensive experience with video games in the past it can be implied that Ruby always looked like that. It is a retcon, not a plot hole. Sun: Diggin' the new outfit, by the way!

Also, we literally saw a picture of Team RWBY in their previous outfits. I think it is safe to say that they all just simply changed their clothes.