[metapost] background and non-rgbcolors

[Stephan Hennig]

Taco Hoekwater schrieb:

> background is simply a variable defined in plain.mp. If you want it
> to be different, redefine it. A simple statement will do:
> 
>    cmykcolor background;

Thanks!  Quite elegant. :)

(But as I now realize withoutcolor doesn't help me discarding unfill
operations by means of colour arguments. :(

Best regards,
Stephan Hennig