3D Healthbar alignment

I have two planes that form a health bar, one green, one red. When I scale the green one down, both sides are scaled down, showing red on both sides. I would like the red to only change on the right side. So, I must align the green bar to the left.

Does anyone know how to do this?

P.S. I don’t want to use GUI

Since the anchor of game objects inside of Unity is always in the center, this of course is the intended effect.

Unity does not support moving the anchor of a game object inside Unity itself. Thus, the easiest way to get around this is to create your green health bar plane inside of a 3D program of your choosing, put the anchor on the left most or right most border, and import that plane into Unity.

Since the anchor is moved to either side of the imported object, scaling will now look like the image is getting cropped, which I believe is the effect you’re after.

EDIT: By anchor, I actually mean pivot.