Christian Lawson-Perfect @christianp

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**Ana Tudor** @anatudor@mastodon.social · Feb 28 *

Feb 28 *

Ana Tudor @anatudor@mastodon.social

Made a gallery of such #SVG gradient + #filter effects blobs on @codepen
https://codepen.io/thebabydino/full/YPzNWoR

Also includes an explanation of the how behind and interaction: the focal point of the `radialGradient` the blobs start from follows the cursor on hover.

Different blobs for light/ dark mode.

Comparative screenshot of a few of the blobs in both light and dark mode.

$Demo screen with the info section. Each distorted blob starts out as a circle, tightly fit inside its parent svg element (which has its viewBox set so its 0,0 point is dead in the middle). This circle then gets a radialGradient fill. Choosing the SVG radial gradient over the CSS one as it also allows setting focal point coordinates (fx,fy) distinct from cx,cy - hover a blob to see how its focal point follows the cursor. <radialGradient id='g' gradientUnits='objectBoundingBox' fx='.35' fy='.65'> <stop stop-color='var(--c0)'/> <stop stop-color='var(--c1)' offset='.5'/> <stop stop-color='rgba(from var(--c1) r g b/ 0)' offset='1'/> </radialGradient> The circle with the gradient is then blurred, distorted & given a grainy/ dithered look. The last two actions make use of the same concept of altering the input using noise generated by feTurbulence as a displacement map. The displacement used for distortion is relative to input size. The noise used for dithering is finer (larger baseFrequency). <filter id='distort' primitiveUnits='objectBoundingBox' x='-50%' y='-50%' width='200%' height='200%'> <feTurbulence type='fractalNoise' baseFrequency='.00713'/> <feDisplacementMap in='SourceGraphic' scale='.3' yChannelSelector='R'/> </radialGradient> <filter id='grain' x='-50%' y='-50%' width='200%' height='200%'> <feTurbulence type='fractalNoise' baseFrequency='7.13'/> <feDisplacementMap in='SourceGraphic' scale='32' yChannelSelector='R'/> </radialGradient>$

#svgGradient #cssGradient #blob

**Ana Tudor** @anatudor@mastodon.social · Feb 28

Feb 28

Ana Tudor @anatudor@mastodon.social

Grainy distorted gradient blob: 1 #SVG `radialGradient` (setting a focal point `fx,fy`) vs. multiple #CSS `radial-gradient()` layers (no option to control focal point).

Using filters for distortion & grain effect.

A bit more detail on this https://www.reddit.com/r/css/comments/1j03iyv/comment/mf89ri9/

Comparative result of the SVG radialGradient vs. the CSS radial-gradient() blob.

#svgGradient #cssGradient #blob

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