The more advanced methods are these: ]]> The parameters for these methods are very similar. Both scale() and composite() creates a transformation of the source image by scaling by $scale_x and $scale_y then translating by $offset_x and $offset_y, then rendering the rectangle ($dest_x, $dest_y, $dest_width, $dest_height) of the resulting image onto the destination image replacing the previous contents. The composite() method has an additional $overall_alpha parameter specifying the transparency of the source image when it's composited. The composite_color() is one monster method that can be used to replace all the methods seen so far.