Wii U demo used Unreal Engine?

A tech demo demonstrating the Wii U's graphical prowess shown during Nintendo's E3 presser today may have been powered by Unreal Engine, judging by a Tweet from Epic boss Mark Rein.

During its new console announcement earlier today, Nintendo showed an impressive clip in which a bird flew around a traditional Japanese scene past cherry blossom and a pond full of koi. Check it out below.

Prior to Nintendo's event, Epic VP Mark Rein hinted that it would be putting in an appearance at the show. Nothing concrete materialised, but it seems that the bird footage may have utilised Unreal Engine.

A post on Rein's Twitter feed following the event stated, "No announcement to make today but let's just way 'Water meet fish'".

If true, it would be the first Nintendo system in some time to support Unreal tech. Earlier this year, Rein confirmed that the engine couldn't run on the 3DS.