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Gray Gradient Texture

  1. function rect(x1, y1, x2, y2, col, blur = 0.1) {
  2.   const dx = x1 - x2;
  3.   const dy = y1 - y2;
  4.   const dist = Math.sqrt(dx * dx + dy * dy);
  5.   return `radial-gradient(circle at ${x1}% ${y1}%, ${col} 0, ${col} ${dist}%, transparent ${dist +
  6.     blur}%)`;
  7. }
  8. const blends = 'multiply,screen,overlay,darken,lighten,color-dodge,color-burn,hard-light,soft-light,difference,exclusion,hue'.split(
  9.   ','
  10. );
  11. const cols = ['black', 'white'];
  12.  
  13. function gen() {
  14.   [...document.querySelectorAll('div')].forEach(d =>
  15.     d.parentNode.removeChild(d)
  16.   );
  17.   for (let j = 0; j < 4; j++) {
  18.     const rects = [];
  19.     for (let i = 0; i < 10; i++) {
  20.       const x = Math.random() * 100;
  21.       const y = Math.random() * 100;
  22.       const s = Math.random() * Math.random() * Math.random() * 30 + 3;
  23.       const col = cols[~~(Math.random() * cols.length)];
  24.       rects.push(rect(x, y, x + s, y + s, col, Math.random() * 10));
  25.     }
  26.     const el = document.body.appendChild(document.createElement('div'));
  27.     el.style.backgroundImage = rects.join(', ');
  28.     el.style.mixBlendMode = blends[~~(Math.random() * blends.length)];
  29.   }
  30. }
  31. gen();
  32.  
  33. document.body.innerHTML += `
  34.   <button id="regen">Regenerate</button>
  35.   <style>
  36.     body, html {
  37.       height: 100%;
  38.       background: #ccc;
  39.       margin: 0;
  40.       background-repeat: no-repeat;
  41.       width: 100%;
  42.     }
  43.     div {
  44.       position: absolute;
  45.       top: 0; left: 0;
  46.       width: 100%;
  47.       height: 100%;
  48.     }
  49.     #regen {
  50.       position: absolute;
  51.       width: 100px;
  52.       height: 30px;
  53.       background: #ccc;
  54.       border: 1px solid white;
  55.       margin: 1em;
  56.       cursor: pointer;
  57.       transition: all 250ms ease-out;
  58.       z-index: 999;
  59.     }
  60.     #regen:hover { background: #333; color: white; }
  61.   </style>
  62. `;
  63.  
  64. regen.onclick = gen;

Playing around some more with lots of linear gradients.

snippet.zone ~ 2021-22 /// {s/z}