circle.SetFillStyle(G4Circle::Filled) (example in user Manual 3.16.3) if we try to use hashed or noFill the circle is still filled. What to do to change the FillStyle?
Only the OpenGL drivers implement this at present. There is a continuous programme of work to implement this and several other features of graphics. Please be patient.
This feature has been improved in the latest vis tags, hopefully available in the next reference tag and possibly in a patch - watch for news. Specifically, circles and squares are now correctly drawn at screen size or world size using OpenGL. noFill and filled are implemented, hashed defaults to filled. They face the camera when first drawn but are rotated with the view in OpenGLStored mode. The status with other graphics systems is under review.