The only 'confusing' thing with the splash shot and the fat/thin effects is that when you play a splash shot IRL, often the technique is to hit behind the ball into the sand. Some folks have varying distances they hit in to the sand, I usually work on about 2 inches.
Do this in the game and the ball goes nowhere because it treats it as being hit fat. So for me, the snap line then becomes my IRL 2 inch behind the ball line. Hit it slightly thin and that is like me hitting right at the ball in the sand.
I posted this earlier in the thread, indeed 6 o clock is the perfect splash shot ie sand first.
'PS 'thin' the bunker shot is probably a bit of a misnomer. What it should probably say is 'thinner' as all good splash shots IRL are hit behind the ball. When you hit between 0 and 2.5 degrees thin at tour pro you are effectively taking less sand but you are still hitting a splash shot. Once you're up around 4 degrees, you're well into the realm of a ball first thin'