I actually had the river loading in early, but then I made it load in "on time" so a new part of river will appear in time with the next beat. But yeah this kind of ruined the seamlessness ...
Maybe there's a visually striking way of doing this, with some special effects that could maybe not be seamless but sort of interesting and fun. Like loading the water in before hand and having the landscape sort of animate in. There's a lot of room for fun here =D
