I may be new on this forum but I'm not new to Paint.NET. It has been my image editor of choice for a very long time now, but I'm looking for an effect that I cannot quite seem to find anywhere, although I have found similar. What I am looking for is to crop an image, but not using a rectangle - I'd like to crop an image with a quadrilateral shape. Then, rather than there being white/transparent space around the cropped image, I'd like the cropped image to be stretched/distorted to fill the previous canvas.
If you'd like a visual representation of what I'm trying to do, skip to 0:40 in this video:
0:40 through 1:05 details the kind of effect that I want to achieve in Paint.NET . I want to drag some knobs, or well "pushpins" over the image, click a button, and have the cropped selection fill the canvas' previous size.
Now, I did find Evan Old's Quadrilateral Reshape plugin, and it does something along the same lines as what I want, but not the same - more like the opposite. The knobs stay on the outside of the shape and cannot go inside to crop the image, rather the image stays "stuck" to the outer knobs, which was disappointing because the screenshots suggested that I could do otherwise (the screenshot shows a reshape/matte tickbox which looks like it would do the job) but the option to invert the knobs to go inside is nowhere to be seen.
I also found dpy's DistortThis (which does something similar to Evan Old's plugin) and the Perspective plugin (which is not what I am trying to accomplish either). I also saw Grid Warp come up, but I have no idea how that is relevant to the effect I need.
Any help is appreciated. I'd like to stick to Paint.NET and plugins obviously, but I'd also welcome software suggestions, GIMP not included (eww) and 3dvia Shape not included either (obsolete software).
(EDIT: spelling mistake)