In VR mode on PlayStation 4, if you are above water and look into the water, your + at the middle of the screen will disappear as it goes under, and also the blocks you look at will not become brighter. This makes it hard to build in shallow water. In the picture included, I show half of the + above water and visible, but the half under the water is not visible. This also happens when you are underwater and are looking out of the water, but if both you and the + are underwater you can see it.