I see metafunction->pict.  It's basically what I want for a game I'm 
designing.  It renders metafunction like this:

<https://lh3.googleusercontent.com/--e7GUGr3qkE/W1JEgDHcSMI/AAAAAAAADSc/yKXJng5mMB0-ZyTb_B2vFRvzg8KiXn-RwCLcBGAs/s1600/metafunction.png>

However, I was wondering if there's a way to heavily customize the 
rendering -- or better yet, to access the underlying data structure for 
metafunctions, so I can make my own render function.  Something like this 
silly example:

<https://lh3.googleusercontent.com/-8722u1BOCM8/W1JFoXloAcI/AAAAAAAADSo/E1H2nmqgzLsMdFWQRnw_K7QGoxQDnm55wCLcBGAs/s1600/temp.png>


If there's not a provided way to do this, that's fine.  My Plan B was to 
write a macro that both defines the metafunction and additionally stores 
the relevant info for rendering later.

I figured I'd ask, though. I didn't see anything in the API, and I poked 
around in the source code a bit too.  



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