A method of retrofitting a reverse osmosis system, includes rerouting concentrate water, received from a membrane, from a drain to a water source. Optionally, the gaming machine communicates with the award server via a network server. The 3-D difference lookup table stores the differences between input values corresponding to the upper n bits of the input color image and the 3-D converted color data thereof. as the spherical fine particle powder and low polymerization degree dimethylpolysiloxane, etc.