顺序

html,
body,
svg {
  height: 100%;
}

<svg viewBox="0 0 420 200" xmlns="http://www.w3.org/2000/svg">
  <filter id="emboss1" x="0" y="0" width="100%" height="100%">
    <feTurbulence baseFrequency="0.025" seed="0" />
    <feConvolveMatrix kernelMatrix="3 0 0 -4" order="2" />
  </filter>
  <filter id="emboss2" x="0" y="0" width="100%" height="100%">
    <feTurbulence baseFrequency="0.025" seed="0" />
    <feConvolveMatrix kernelMatrix="3 0 0 0 0 0 0 0 -4" order="3" />
  </filter>

  <rect x="0" y="0" width="200" height="200" style="filter:url(#emboss1);" />
  <rect
    x="0"
    y="0"
    width="200"
    height="200"
    style="filter:url(#emboss2); transform: translateX(220px);" />
</svg>