Question

Is there any method exist to create vignetting/frame effect on picturebox, ie another picturebox with png image as overlay/mask? I don’t want to see sharp edges between picture and background.

Answer 1

You could use OpacityMask : something like

   <Image Width="200" Source="C:\Users\Public\Pictures\Sample Pictures\Chrysanthemum.jpg">
      <Image.OpacityMask>
        <RadialGradientBrush>
          <GradientStop Offset="0.8" Color="#ffff"></GradientStop>
          <GradientStop Offset="1" Color="#0fff"></GradientStop>
        </RadialGradientBrush>
      </Image.OpacityMask>
    </Image>

would give a vignette effect.