Learn about applying a directional force to a liquid.
- [Instructor] To impart velocity to a Bifrost fluid,…we use a motion field.…Select the bounding box in the viewport,…and the liquid-shaped node is selected.…Go into the Bifrost Fluids menu…and choose Add, Motion Field…and in the outliner we can open up BifrostMotionField1…and inside that is the container…and with that container selected,…let's go into its attributes.…
We have the motion field properties.…Magnitude of one.…When we open up the Field Direction here…and we see that direction is set to positive X.…We have X, Y and Z here…with X set to a value of positive one.…Press play in the timeline…and we can see that the fluid is drifting slightly…towards screen right in my case.…The fluid is being pushed to the side…in the world positive X direction.…
Press stop and rewind.…Back in the MotionFieldContainer attributes,…let's change the direction.…Set direction X to zero…and direction Z to one,…press play…and now the fluid is moving…in the world positive Z direction.…Press stop and rewind that.…Let's adjust the Motion Field Magnitude.…
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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