Linear gradient might produce artifacts on Linux.
See attached images (look for a red dot in the upper left corner of the shape).
Affected tests:
SceneGraphAutomated/test/scenegraph/functional/Shape2Test/Polygon_LINEAR_GRAD
SceneGraphAutomated/test/scenegraph/functional/Shape2Test/Rectangle_LINEAR_GRAD
See attached images (look for a red dot in the upper left corner of the shape).
Affected tests:
SceneGraphAutomated/test/scenegraph/functional/Shape2Test/Polygon_LINEAR_GRAD
SceneGraphAutomated/test/scenegraph/functional/Shape2Test/Rectangle_LINEAR_GRAD