[Therion] Can't change default l_wall style with metapost

[Paul Rowe]

Hi,
I have changed wall subtypes before in my layout. e.g. Using Bruce Mutton's

code metapost
def l_wall_unsurveyed (expr P) =
  T:=identity;
  pickup PenC;
  thdraw P dashed evenly scaled (2*optical_zoom);
enddef;
endcode

However, I can't get this working on the default l_wall type. Any changes,
including using the same style as in the above l_wall_unsurveyed example
get ignored. e.g.
code metapost
def l_wall (expr P) =
  T:=identity;
  pickup PenC;
  thdraw P dashed evenly scaled (2*optical_zoom);
enddef;
endcode

I'm not sure what I'm missing. I'm first trying to prove I can override
this, and then working on a wall style with a shadow or external
cross-hatching.

Thanks,
Paul
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20230725/215c4c42/attachment.htm>