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Foam particles adhere to several simple rules when simulating: underwater bubbles rise up, bubbles in the air fall down, bubbles can stick to each other, and bubbles can be resistant to external pressure. Regarding the generation of Foam particles, Foam can be born from Liquid particles, Splash droplets, a Source, or a script. Meanwhile, the Foam can disappear when it exits the grid (see the Max Outside Age parameter), or disappear randomly (see the Half Life parameter).
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Note that unlike shading Liquid particles, in order to render Foam particles, you’ll need to use the Phoenix Particle Shader to shade them. The Particle Shader enables you to create various fine-tuned appearances for particles such as Foam, Splash and Mist, in order to achieve realistic looking effects. For example, when rendering Foam particles, you can use the Particle Shader's Cellular mode to get a look that is very similar to real foam, which makes it possible to shade foam that is close-up to the camera, and have the results look convincing. |
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Birth Volume | usefbconfgeom, fbconfgeom – When enabled, allows the foam to be born naturally by the simulation only inside a specified geometry object. This includes foam born according to the conditions set by the Foam Amount and Birth Threshold parameters of the Foam, as well as the Foam on Hit parameters of the Splash. The foam born inside the Birth Volume can travel outside the volume without a problem. The difference between this approach and spawning foam inside a volume manually from a Source object is that using a Birth Volume, the foam birth will follow the simulation criteria of the simulation and will look and behave more naturally.
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Example: Birth Threshold
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The following video provides examples to show the differences of Birth Threshold values of 50, 100, and 200. |
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Software used: Phoenix FD 4.30.01 Nightly (02 Oct 2020)
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Lifespan
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Example: Variation Small
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The following video provides examples to show the differences when Variation Small is set to 0, 1, and 50. |
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Software used: Phoenix FD 4.40.01 Nightly (13 May 2021)
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Example: Variation Large
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The following video provides examples to show the differences when Variation Large is set to 0, 3, and 6. |
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Software used: Phoenix FD 4.30.01 Nightly (27 Jan 2021)
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Example: Size Distribution
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The image below provides more details on the differences between Size Distribution values of 1, 20, and 100. |
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Software used: Phoenix FD 4.30.01 Nightly (02 Oct 2020)
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Dynamics
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Example: Foam Volume
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The following video provides examples to show the differences when Foam Volume is set to 0, 500, and 1000. |
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Software used: Phoenix FD 4.30.01 Nightly (02 Oct 2020)
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Example: Rising Speed
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The following video provides examples to show the differences when Rising Speed is set to 0, 20, and 100. |
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Software used: Phoenix FD 4.41.02 Nightly (20 Sept 2021)
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Example: Falling Speed
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The following video provides examples to show the differences when Falling Speed is set to 10, 35, and 100. |
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Software used: Phoenix FD 4.30.01 Nightly (02 Oct 2020)
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Anchor Patterns Patterns
Patterns
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Example: Formation Speed
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The following video provides examples to show the differences of Formation Speed values of 0, 0.5, and 1.0. |
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Software used: Phoenix FD 4.50 Official
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