Unity 2D Built in Sprite Masking?

I have need to clip my character’s sprite as they pass behind something in game. I’ve seen a couple tutorials that say, it’s easy, you just select this shader called “Sprite - Masked” and set it up. Well I have Unity V5.5.1f1 Personal and this shader does not show up. Is it part of Pro or from the asset store or what?

I’m not sure about that shader, but if I correctly understand your problem, you can always use transparent sprites that have a larger Sorting Order value. There was a recent post in this subject: