Sliding an Edge or Vert w/o stretch/pinch texture image?

[Justanother1]

Another option, depending on your needs .....
take the Image into an image editor and make a height map (grey scale) or Normal Map or Both. Different renderers treat these differently so it might be a hit or miss, and this all really depends on lighting, but if it's backdrop stuff, and your not looking for a Rendered shadow (or you can fake that too) it might be easier to trick the camera! ... I use Paint.NET ..with plenty of Free Plugins ... but you can get Gimp free as well ...