Fill with color in Geometry App

[Alberto Candel]

Hello,

There may be a good reason for the following behavior with the "fill with color" option in the Geometry App, but I cannot figure it out. The following command

GA:=polygon(0,1+i,2*i,-1+i/2,('display')=(3+filled))

plots a quadrilateral with vertices 0, 1+i, 2i and -1+i/2 and filled with yellow. However, if I store the vertices in a list L1 (say) then

GB:=polygon(L1)

displays the same polygon with no color, just the border (as expected) but

GC:=polygon(L1,('display')=(3+filled))

displays nothing. Why is that? Thank you.