To my knowledge, black powder from the time had a TON of smoke. Due to the powder of the time, most guns produced a dense cloud of smoke after being fired. And probably won't be THAT hard to add, since I have done video game texturing and timing before. And if ya don't believe me of smoke and sparks, here is a slomo video of a flintlock musket.
And here, a cannon. And could affect ship battles due to excesive galleon or brig firing and smoke sticking for a bit. Could fit well as well.
And maybe the explosive barrels too! This is 5 pounds of black powder, could cause this much damage. wait if 5 pounds could do that what can a full barrel do...?
Basically this can add a lot of the pirate theme without being too difficult to implement.
