Help with particle size adjustments?

bbinkovitz's picture

So, I am working on the attached composition and I want a way to adjust particle size over time. I want the particle source to spit out particles of varied sizes. All I've been able to figure out so far is how to make all of the particles on the screen grow and shrink in unison by changing stuff in particle render: structure, but that's not what I want. I have also tried changing the size, mass, and area on the generated object itself, but this seems to have no effect. Ideas?

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candywheel.qtz10.39 KB

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cwright's picture
Re: Help with particle size adjustments?

You're using the GL Point Structure patch for rendering -- that patch exclusively determines its rendered size from 2 inputs: Point Size, and Attenuate. If Attenuate is set to True, farther away points will be rendered smaller than closer points (On supported hardware, so not Intel GPUs).

You current have Attenuate disabled, so points will all be the same size.

Unfortunately, there's no currently-possible way to do per-point size with that patch.

An alternative is to use the Quad structure renderer, and the Particle Render Settings patch to make the output quads all be uniformly sized. Then, modulating the particle size (via LFO or whatever) will affect rendered size.

Here's a composition to show that:

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candywheel-sized.qtz10.51 KB

bbinkovitz's picture
Re: Help with particle size adjustments?

Thanks, that's what I wanted to know.