Quote:
Originally Posted by Hide
Hey there! If you want to be more precise, you could try using GURPS Power Ups – Limitations.
It discusses “either/or” limitations; the guidelines state that the final value must give less of a discount than either of the base limitations, and that this approach is mathematically fair.
I could give it a try for you:
If some of your abilities “require dirt to work” (-20%), and others “work while in the desert only” (-40%) this is a -8% limitation.
The book says you could round this down to a -10%.
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Huh? It's not either/or. It has nothing to do with dirt or being in a desert, it requires a substantial amount of sand, which is more difficult to arrange than having dirt or earth and less difficult than being in a desert.