Change the surface dimensions to match the photo!
564 / 725 X 57 = 44.34 so a surface 44.34 X 57 will match the photo’s aspect ratio. This avoids distortion of the image.
Image_Sampler_4 (irrisolto)_2019Oct29a.gh (173.5 KB)
Note that at higher resolutions, a flaw in the image can be detected. There are white bars at top and bottom that resolve to a slightly higher elevation than the slightly gray background for the main image. That can easily be fixed in GIMP or Photoshop by removing the light gray background that leaves two white bars barely visible.
Maximum on the ‘Resolution’ sider is 725, the longer image dimension in pixels.
Simplified: (below)
Image_Sampler_4 (irrisolto)_2019Oct29b.gh (172.4 KB)