Just as a thought ... what you currently do with metapost at the moment is a bit of cheating to overcome lack of a feature in metapost - there is still an infinitely thin line between segments and a dumb renderer might display artifacts. Yes, I am aware of this, just wanted to hear something from those who know metapost better.
If I wanted to draw a logo (very important graphic that will be used more often) and if I had control points, I would consider creating a raw postscript (EPS) graphics (filling with even-odd rule), convert it to PDF when needed and then use it inside ConTeXt documents (or even inside metapost graphics) as-is. I'm doing something like that already, I was just curious to which extend I could use metapost for this.
You could also manually post-process the graphic generated by metapost (removing the link between the inner and outer part of letters and properly fill). But if the current approach is fine with you ... just use it. I think I'm happy with this solution. (Also, I was looking at the graphictext function, isn't that also doing similar things for filling out letters?)
Mojca Thanks for explaining this!
Adam