effet_verre_cannele.pde

// renaud.jean-francois(arobas)uqam(point)ca
// Syntaxe Processing version 3.5.3
// jeudi, 19 septembre 2019

/*
Remake of an effect that I saw in a post on Facebook.
https://www.facebook.com/groups/creativecodingp5/permalink/2371544796426883/
*/

PImage img;
int stepSize;

void setup() {
  img = loadImage("filip-mroz-180859-unsplash-sqr.jpg");
  surface.setSize(img.width, img.height);
  background(0);
  fill(255);
  noStroke();
  noLoop();
  
  stepSize = round(img.width / 80.0);
  //println(stepSize);
}

void draw() {
  background(img);
  
  for (int i = 0; i < width; i+=stepSize) {
    if ((i > stepSize) && (i < width-stepSize)) {
      copy(img, i-int(stepSize*1.5), 0, (stepSize*3), img.height, i-int(stepSize*0.5), 0, stepSize, height);
    }
  }
  
  // border
  fill(8, 24, 24);
  rect(0,0,width,20);
  rect(0,0,20,height);
  rect(width-20,0,20,height);
  rect(0,height-20,width,20);
  
  // export
  // save("rendu_processing_effet_verre_cannele.jpg");
}

Image file to be put in the data folder:

And the result you will obtain :

Very nice. Thanks for sharing.