Bug introduced in 10.0 and fixed in 10.4.0

EdgeForm[] does not work.

Graphics[{EdgeForm[], Green, Opacity[0.2],HalfPlane[{{0, 0}, {1, 0}}, {0, 1}]}]

enter image description here

Any idea how to remove edges of HalfPlane

  • 3
    $\begingroup$ That seems sort of bug-ish, since in the documentation for HalfPlane, it says that "Graphics rendering is affected by directives such as FaceForm, EdgeForm, Opacity, and color." $\endgroup$
    – march
    Commented Oct 19, 2015 at 23:11
  • 4
    $\begingroup$ EdgeForm[Transparent] is another possible workaround. $\endgroup$ Commented Oct 20, 2015 at 0:14

1 Answer 1


It looks like a bug to me, since HalfPlane responds to other EdgeForm directives. For example, in the following HalfPlane responds to EdgeForm[Red].

  EdgeForm[Red], Green, Opacity[0.2], Disk[], HalfPlane[{{0, 0}, {1, 0}}, {0, 1}]}]


A work-around is

  EdgeForm[Red], Green, Opacity[0.2], Disk[], 
  EdgeForm[Transparent], HalfPlane[{{0, 0}, {1, 0}}, {0, 1}]}]



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