Each color channel is changed by its own expression. The input values H,S and V are based on the texture's old pixels. X and Y reflect the pixels' coordinates, ranging from 0 to 1.

Image 4 for instance was created by setting H=Y, which means that the vertical coordinates are translated to the hue of the new colors. The saturation S was set to 1 for the entire texture (S=1). The brightness remained unchanged (V=V or an empty field for V).