It is limited to 18 because internally there is a 32-bit bitfield used to represent the channels. So there are 8 built in channels, 6 unspecfied channels reserved for the engine, and then 18 available for the game to use.
It is limited to 18 because internally there is a 32-bit bitfield used to represent the channels. So there are 8 built in channels, 6 unspecfied channels reserved for the engine, and then 18 available for the game to use.