Gort
Explorer
I have a problem with how natural armour stacks with regular armour in D&D. Generally speaking this problem is caused by poor monster design in the standard books with regard to polymorphing or other player use. The monsters are thought out in order to be a challenge to the right level of party, and if the creature doesn't have a good enough AC, it's standard to dump an arbitrary natural armour bonus onto it. (Case in point, the Ravid. The picture of it shows it looking about as tough as a plucked chicken that's been on a month hike. I'd say maybe a +1 or +2 natural armour bonus, but noooo. +15 instead) While this solves the problem of making the creature a suitable challenge, it does not solve the problem of players changing into it, or an inexperienced GM putting armour onto it and making it unhittable.
My biggest problem with stacking armour onto an already monstrously well armoured creature is not game balance or a spell I don't allow in my game. It's the fact that if a player came to you and asked, "Can I wear a Large suit of plate mail over my medium suit of plate mail?" you'd initially laugh at him, and then tell him that such armour would make it virtually impossible to move, if not by sheer weight then by the sheer bulk and awkwardness of it. The rules outright forbid it. However, they do allow stacking of armour with natural armour that's magnitudes more protective and would be just as unlikely. (Case in point - a barbed devil in platemail)
So, my suggestion to fix such a problem would be similar to the max dex bonus that armour has. Instead, it would be a max natural armour bonus. After all, there's only so much armour a creature can have weighing on it, natural or otherwise, before adverse effects make it impractical.
It would also help balance characters with no "natural natural armour" with those who stack magical natural armour on top of their natural natural armour - I preferred that rule back in 3.0 to be honest.
My biggest problem with stacking armour onto an already monstrously well armoured creature is not game balance or a spell I don't allow in my game. It's the fact that if a player came to you and asked, "Can I wear a Large suit of plate mail over my medium suit of plate mail?" you'd initially laugh at him, and then tell him that such armour would make it virtually impossible to move, if not by sheer weight then by the sheer bulk and awkwardness of it. The rules outright forbid it. However, they do allow stacking of armour with natural armour that's magnitudes more protective and would be just as unlikely. (Case in point - a barbed devil in platemail)
So, my suggestion to fix such a problem would be similar to the max dex bonus that armour has. Instead, it would be a max natural armour bonus. After all, there's only so much armour a creature can have weighing on it, natural or otherwise, before adverse effects make it impractical.
It would also help balance characters with no "natural natural armour" with those who stack magical natural armour on top of their natural natural armour - I preferred that rule back in 3.0 to be honest.