There is a lot of good threads about this, amounting to a tutorial. A simple search for halftone dot vector will reveal them. It is not really needed to limit the search to Illy threads beacuse most of them are.
I am working on a modification of the same thing which, instead of scaling the Symbol Instances, uses the grayscale values of the mosiaic tiles to weight a random yes/no decision as to whether to place an Instance. The result is like a diffusion-dither stochastic screen, wherein all "dots" are the same size, and tones are simulated by their frequency (density), not their size.
The scripts are very slow; the kind of thing I launch and then walk away from for an hour or two.
Understand, though: A true halftone is more than just an array of different size dots. In a true halftone, the dots change shape between circular and square. In the highlight areas, the dots are round and black; in the shadow areas, the dots are round and white; in the midtone areas, the dots "melt" together in transitional "blobs".
Hi Jet and Jacob,
Yeah I love the gradient halftone dot effect where there is a full box of color then it gradually fades away like a gradient but with these halftone dots, never done one before and just wanted to get up with the latest on how to do it as I can see myself using them in future. Thought there might have been a one stop shop plugin for Illustrator or something that provided maximum control and options.