Raw Skill
Raw skill is a raw, linear measure of actions performed with a skill. Every activity is worth some number of base skill points, modified by the difficulty of the task.
Base Skill
Base skill is calculated from Raw Skill, according to the following schedule: For Base Skill to increase by 10, Raw Skill must double.
Raw Skill Base Skill 0 0 2048 10 4096 20 8192 30 16384 40 ... 512K 90 1M 100 ...
Effective Skill
Effective Skill is calculated from Base Skill. Bonuses due to stats, magical effects, armor penalties, clothing, etc. are added to Base Skill to determine Effective Skill.