North

Somebody correct me if I am wrong but what you are showing is a linear function and instead you want to solve an exponential one, before writing any code I would suggest to understand the math behind it otherwise you will be stuck again in no time

Here you go:
 
I personally follow this guy, is pretty good at explaining things

After watching this video try to imagine the sound intensity plotted as this exponential function where y=1 is the idle of the car you should get why you need an exponential function to represent the sound (when you press w to accellerate the sound increases in an exponential way and not in a linear way)

No.

You remove pc.warp and you use d.join(mapindex) instead.
This is how you create different dungeon instances

char_battle.cpp
 
        if (IsAffectFlag(AFF_TERROR))
            dam = (int) (dam * (95 - GetSkillPower(SKILL_TERROR) / 5) / 100);
 
then you can search everywhere, keyword = TERROR