Learn about the direct the emission of foam particles.
- [Instructor] There are numerous helpful attributes…in the Bifrost foam properties to help us…get the look that we want for the foam.…In the outliner, select the Bifrost foam properties node.…And in its attributes let's take a look at…its emission properties.…The most important ones are up at the top.…The emission rate, and the minimum liquid speed,…churn, and curvature.…The minimum attributes are cumulative limits on emission.…Foam is only emitted from the fluid…in places where all three attributes…of velocity, churn, and curvature exceed these thresholds.…
A helpful way of thinking of this…is that each attribute is a mask.…If all three masks were set to zero,…then we would get particles emitted…from every location on the fluid surface.…Increase the attribute values to exclude more areas…from the fluid from emitting foam.…So if I set the minimum liquid speed to seven,…and the minimum liquid churn and curvature to zero.…We can press play to take a look at the simulation.…
Once we let that play out past 100 frames or so,…
AuthorAaron F. Ross
- Bifröst basics
- Analyzing the node structure
- Emitting from a polygon mesh
- Colliding with a polygon mesh
- Adding velocity, friction, and drag with motion fields
- Optimizing space and time accuracy
- Caching simulations
- Meshing and exporting liquids
- Render-time meshing in Arnold
- Applying channel data to Arnold shaders
- Generating foam from a liquid
- Rendering and shading foam in Arnold
Skill Level Advanced
1. Simulating a Liquid
2. Fine-Tuning a Liquid Simulation
3. Caching and Meshing
4. Shading a Liquid
5. Simulating Foam
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