For https://github.com/phetsims/QA/issues/215
I noticed that, near the edges, the intensity shading makes some odd looking points. It also gives the appearance of two lines where it covers part of the red line. This is particularly noticeable when looking at the far left or right, where the red line appears to have wedges or corners. Layering the intensity shading behind all the lines may solve this.
For https://github.com/phetsims/QA/issues/215 I noticed that, near the edges, the intensity shading makes some odd looking points. It also gives the appearance of two lines where it covers part of the red line. This is particularly noticeable when looking at the far left or right, where the red line appears to have wedges or corners. Layering the intensity shading behind all the lines may solve this.