For splashes you either need a little crossbeam sensor or a loooooot of patience. This time I chose the second way and threw the olive 30+ times in the water. Keep in mind to shoot some clean shots, before things get messy, so you can paste parts of the clean shots in the result image later-on.
I tried several apps, but at the end I used the standard app, because it had all the features I needed. And then I used the earphone cable’s plus button as shutter release. In the next image, you can see the making-of. I used one almost clean shot as a basis and then pasted in the glass and the splash.
That worked just fine. What did not work so well, was the white balance. I tried a custom white balance, but the results just looked yellowish and dirty. The reason was, that the halogen lamp I used to deliver a lot of red and orange light, but is not very powerful in the blue part of the spectrum.
I fixed that in Photoshop via desaturating the image, coloring the liquid and restoring the original color of the olive.