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How can I go about recreating this with a procedural material. It's part of a comission and it needs to have seemingly randomly scattered spots of slightly different sizes and colours on a white surface.

Node set ups would be much appreciated!

enter image description here

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It's quite simple node setup so I don't know if it needs explanation:

You could pass the upper Voronoi's Color through a color ramp to define your own colors, or you could connect it to Hue inside Combine HSV node to have all circles with very intense and bright colors.

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  • $\begingroup$ This is great, thanks so much, excuse my node naivety but where can I find the scale, circle size and randomness nodes? $\endgroup$ Jul 14 at 16:25
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    $\begingroup$ Those are all just Value nodes that you find in inputs when you add a node. The OP simply changed the labels on the nodes to make them clearer. $\endgroup$ Jul 14 at 20:21
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Try something like this. Just take the inverse of some 2D Voronoi dots (Clamped with a ColorRamp) with the randomness turned down, then multiply it by the colors from the Color Output, then invert it again:

Dots

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