Alzrius
The EN World kitten
Glad to see that I'm not the only one who remembers this difference between smokepowder and gunpowder.Smokepowder in Ferun is supernatural, becuase it is specifically magic, While on another world gunpower, which does the exact same thing functionally, is not supernatural.
While there's very little functional difference between the two, it's interesting to note that smokepowder doesn't work on Oerth (i.e. the World of Greyhawk, though it works in the rest of the Greyspace crystal sphere), whereas gunpowder does. However, high-level priests of Murlynd have (as per Slavers; affiliate link) the ability to use smokepowder on Oerth. Additionally, Dragon #306 (in the "Paladins of Greyhawk" article) confirms that his priesthood also is able to create and use gunpowder as well.