Post-prostate syndrome - or p-ps.
I was amazed by how one adapts to full size snooker. One just has to wait.
OK. So there are no aim lines. Your vision is focusing hard on the ball and the angle. Initially I had no idea of how much to cut. Straight shots are crazy hard. They go nowhere near. But after a while your estimations get closer and shots go in.
This is on a 27" screen without 3D. Not easy but gives you a good challenge. Very realistic experience. There are no 'scientific' ways to tutor the angle problem, although one trick that helped was to run your cue thru the object ball like a knife. I had a vasectomy as well, come to think of it.