css - SVG pixelated when using CSS3 drop-shadow filter with transform: scale - Stack Overflow
6.7. Drop Shadow
Josh W. Comeau on Twitter: "🔥 `filter: drop-shadow` is the gift that keeps on giving. With `box-shadow`, one sibling's shadow can cast over another, breaking the 3D illusion. By putting `drop-shadow` on
CSS Filter | Suprabha's Blog
Using "box shadows" and clip-path together | CSS-Tricks - CSS-Tricks