The biggest drawback to armor is surprisingly not the weight, mind you its not pleasant to carry 70lbs all day long but armor weight is generally well distributed.
No what makes armor unpleasant is the heat.
Mail is marginally tolerable, even with the weight mostly hanging on the shoulders as its breaths a bit but Plate, well its like wearing a boiler all day.
If you want to simulate this effect in your 3x and Pathfinder games its really easy.
Simply subtract the armor check penalty from armor from any rolls vs heat and fatigue. As with the helmet rules, all reductions to this check (class, masterwork and magic) count as usual. If the helmet is removed (reducing AC vs critical conformation by 4, to a minimum of 10) reduce the penalty by half, round up.
In addition, if desired, a shields armor check penalty can be applied as well though this should only be applied to fatigue, not heat.
One warning though, this does weaken heavy armor for non fighters a bit, so be warned.
Forthcoming visual history of D&D - I am curious about this forthcoming book: *Dungeons and Dragons Art and Arcana: A Visual History*. One thing that it reveals is that many iconic D&D monste...
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