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Old 09-21-2017, 12:47 PM   #6
Join Date: Jun 2005
Default Re: 3e stat conflicts with 4e?

Originally Posted by onetrikpony View Post
HP - Based on surface area in Vehicles and Robots, which seems to make better sense for mechanical things than using HP = ST ~ Mass)
In 4/e ST is not proportional to mass. It's proportional to the cube root of mass.]

It actually isn't a terrible choice in terms of scaling relationships. An animal's muscle mass and body weight are proportional to its volume, but its strength is proportional to the cross-sectional area of its limbs or trunk, which varies as the 2/3 power of volume (to a first approximation; big animals aren't built exactly like small ones). So having weight go as the cube of ST, and basic lift as the square, comes out in the right ballpark.
Bill Stoddard

A human being should know how to live fast, die young, and leave a beautiful corpse. Specialization is for insects.
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