Shroud of the Avatar’s Release 15 begins today. In fact, it begins this morning at 11:30 a.m. EST. The new build features Unity 5, the latest version of the engine that Portalarium says provides it “with both improved performance opportunities and graphical upgrades” that will “dramatically improve the visual presentation of SotA.”
The conversion is such a big deal that it required the devs to redo nearly every graphical asset in the game. As such, you should expect a “particularly large” patch for R15. The patch announcement post contains a full list of deliverables including new mainland scenes, new sun and moon magic skills, new crafting skills, and more.
[Source: Release 15 instructions]