ยป -RTSS A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 0-9 Refers to the Ogre Run-Time Shading System. From Ogre 2.1 on it is replaced by the High Level Material System.