Originally posted by lightsenshi:
Actually, ranged weapons are going to be a big leveller against D&D style monsters. After all, how many actually HAVE natural armor (i.e. an AR).
Mr. Dragon meet Mr. PGMP-15.
Well, a lot of monsters in D20 have natural armor. If you look at the AC of most monsters, it's listed right there, i.e. +8 natural. IIRC (at work, so no books on me), ancient armor in traveller has it's AR divided by 2 vs modern weapons. You could just use the natural armor bonus divided by 2 to get a D20 monster's AR.
Another thing to consider is in D20, you have damage reduction. Most powerful monsters have some form of damage reduction, like 15/+3 for the biger dragons. Since T20 weapons aren't magical, you could have the damage reduction work like an additional layer of armor.
Also, some monsters from D20 have elemental resistance, which may or may not help against certain energy weapons. Would a Fire Elemental be immune to lasers? (which are mostly heat?)
And, since the damage reduction of most D20 monsters is also used to determine how well their natural attacks penetrate other creatures damage reduction, I'd say that if a Dragon had a 15/3, then it's claw/bite attacks would penetrate 3 points of T20 AR, like an AP round.
I don't think I would want to treat monsters like vehicles. Too complicated.