Getting Bottom Position of Sprites inside a Texture Sheet?

I am a total shader noob, however, I’ve made a custom shader for some Paper2D sprites :slight_smile:
I make Instances of the shader to set the bottom position percentages of each sprite relative to it’s texture sheet. I have to do this to make my shader behave in the right way.
My question is: Can I get the bottom position dynamically inside the shader itself? I made this drawing to make the problem easier to understand: