And the frame rate issues are definitely the engine. Wind Waker HD has the same problem when things get busy. It's a decade old engine, it was never intended to handle these draw distances and texture resolution. It being developed by a third party likely doesn't help but the fact is even the lauded, praised, nearly worshipped WWHD developed by Nintendo (which BTW had lower res textures and significantly lower polygon counts than this despite the lighting improvements) has some really heavy hits to frames in certain areas.







