Never been able to figure it out and don't know that it isn't just randomization from the programmers.
I know, for a full shot you're supposed to hit the yellow bar right? Maybe it's Champ mode... maybe Pro is much more forgiving. But I simply cannot figure out the "sweet spot". Sometimes it seems like I've hit it square on and the ball barely clears the bunker. Other times the same snap will carry over the green.
Certainly in Champ mode, I avoid fairway or long bunker shots like the plague.
If anyone knows the secret, I'm all ears.