<img src="https://picsum.photos/id/1069/300/300">
<script>
if (CSS.paintWorklet) {              CSS.paintWorklet.addModule('/t_afif/pen/xxdVBaa.js');
}
</script>

@property --f-o{
  syntax: '<number>';
  inherits: false;
  initial-value: 1;
}

img {
  -webkit-mask: paint(fragmentation);
  --f-o:1;
  --f-n:10;
  --f-m:10;
  transition:--f-o 1s;
}

img:hover {
  --f-o:0;
}

body {
  background:pink;
}

registerPaint('fragmentation', class  {

  static get inputProperties() {
    return [
      '--f-n',
      '--f-m',
      '--f-o'
    ]
  }
  
  paint(ctx, size, properties) {

    const n = properties.get('--f-n');
    const m = properties.get('--f-m');
    const o = properties.get('--f-o');
    const w = size.width/n;
    const h = size.height/m;
    const l = 10;
   
    
    for(var i=0;i<n;i++) {
       for(var j=0;j<m;j++) {
         ctx.fillStyle = 'rgba(0,0,0,'+((Math.random()*(l-1) + 1) - (1-o)*l)+')';
         ctx.fillRect(i*w, j*h, w, h);
        }
      }
  }

})