Yes, I think Particular would work nicely there. You might want to take a look at some of the Harry Frank presets to get some ideas.
I think the halftone preset here in14 presets
and
lite bright should be a good starting point.

Dale

I’ll try to make it short:
We’re trying to achieve a “living” animated
book page by linking the size (or the spacing)
of the letters on the page to the luminance of
the source layer - by using a sampleImage
expression.

This works - however you seem to need one layer
per letter!! which slows down the computer drastically… (working with 900 layers…) do
you think there is a better way by doing this
with Trapcode Particular??

(something like letters floating around,
accumulating wherever the source layer is dark)

Thanks for reading this.
I suspect this is not exactly a forum, so I’d be
REALLY grateful if you gave a short response.

thanks, Jon