I used to draw in transparent color in MetaFun with:
newinternal tfill_mode; tfill_mode := 1; % transparency mode for inside
newinternal tfill_fact; tfill_fact := 1; % transparency factor for inside
def withFillColor = withcolor transparent(tfill_mode, tfill_fact, fillcolor_) enddef;
fill somepath withFillColor;
Suddenly (since the june update I guess) this fails.
Because
fill somepath withcolor fillcolor_;
is still working I wonder if something has done to this transparency business.
If there was a change, why? It brings me trouble.