Gave this a go this morning and the demo level seem to be ok. which version of the Engine are you running on? also, for your terrain, are you using it for the collision checks? - This won’t be ideal.
As for the water, I used some from vr projects but they are mostly custom and proprietary for the company i worked for. I’ve had success though for smaller projects with using the free ones from Soul Cave and modifying them to suit (performance & look) - in a pinch, they’re a pretty good starter
