This page will go over the basics of Axiom and all the various setting you need to know about before creating your first simulation.
To create a new solver node you need to be in the SOP context in Houdini. Press tab to bring up the node menu and search for “Axiom Solver” in the dialogue. Then click anywhere to drop the solver down.
<aside> 💡 Axiom is not available in DOPs. It is implemented as a SOP node.
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By default, the solver will set the start frame to the first frame on your timeline. You can change this to whatever start frame you want.
Time Scale will allow you to make your simulations faster or slower by globally changing the length of time of each simulation step.
If you have a fast-moving simulation you can add more substeps to make the motion resolve better. Doing this will slow down the solver.
Mode will let you set what fluid simulation algorithm you want to use. Traditional will use an algorithm that acts like classic fluid dynamics. Reflection will use the new reflection-advection algorithm to try and preserve energy that is usually lost with the traditional mode. Reflection single step is a faster version of the reflection mode but is not as accurate.
Division size will control the voxel size of the simulation grid. Smaller values will make the grid higher resolution.
The info section will give you basic information about the current simulation such as what device is being used and how many voxles are in use.
Allocated memory will tell you how much memory the solver is currently using and used voxels will tell you out of that allocation how much of the memory is being used.
<aside> 💡 Keep in mind this is not the total amount of memory your device has or can use. The solver does not need to be using all of your device’s memory if it does not need to.
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