[crossfire] Getting more artists

[Yann Chachkoff]

> Unless you start to allow fractional coordinates, such as (2.5, 8.3).
> I am unsure if a move away from 100% tile-based would be a good thing
> at this time though.
>
Moving to fractional coordinates would be somewhat more complex to implement; enlarging objects so they occupy more tiles requires no changes in the code (except, maybe, to manage multitiled players).