// undine docs
Presets
Presets provide reusable starting points for different kinds of liquid behavior and mesh output.
The current panel exposes material presets in Sim Params and Meshify presets for surface reconstruction quality.
Simulation material presets
Undine beta includes stable presets for water and viscous liquids, experimental unified Stokes presets, and roadmap EVP presets for future elastoplastic behavior.
The Sim Params tab exposes quick material families. The table below shows all available presets with performance classification.
Stable Beta Presets
| Preset | Performance | Use as a starting point for | Key parameters to review |
|---|---|---|---|
| Water | Realtime | Clean low-viscosity liquids, general-purpose water simulation. | Gravity, PIC Blend, pressure iterations, surface tension. |
| Water/Max FPS | Realtime | Fastest iteration speed, maximum interactive performance for water. | CFL target, substep limits, pressure tolerance. |
| Oil | Realtime | Heavier liquids with smoother, slower motion than water. | Drag, viscosity (low), friction, damping. |
| Honey | Production | Slow, thick, highly viscous liquids. Uses implicit viscosity solver route. | Substeps, CFL target, viscosity mode (Advanced/Weighted Implicit), collider contact. |
| Chocolate | Production | Dense, thick non-Newtonian materials with Bingham-style rheology. | Density, rheology mode, yield stress, surface behavior, mesh thickness. |
| Dense Chocolate | Production | Very thick chocolate with higher yield stress and density. | Rheology parameters, plasticity threshold, mesh smoothing. |
| Slime | Production | Cohesive, viscoplastic, elastic-looking stylized fluids with Herschel-Bulkley rheology. | Surface tension, rheology mode, yield stress, vorticity, reseeding. |
| Viscous Glass | Production | Extremely slow-flowing transparent thick liquid. | Viscosity percentage, friction, mesh quality, smoothing iterations. |
| Thick Sheet | Production | Cohesive sheet-like liquid behavior. | Surface tension, density, anisotropic meshing, velocity influence. |
| Gel | Production | Semi-solid gel-like material with moderate viscosity. | Viscosity, damping, surface cohesion, mesh kernel radius. |
Experimental Presets
These presets use unified Stokes formulations that are under active development. Behavior may change between beta versions.
| Preset | Status | Description |
|---|---|---|
| Stokes Unified (variants) | Experimental | Unified viscosity solver route. May change significantly in future releases. |
Roadmap Presets
These presets reference elastoplastic MPM features that are post-beta roadmap items. They are included for testing but not production-ready.
| Preset | Status | Description |
|---|---|---|
| EVP (Elasto-Visco-Plastic) | Roadmap | Full elastoplastic constitutive model for snow, dough, cream. Post-beta development. |
Custom simulation presets
Custom presets capture tuned Sim Params values under a reusable name.
Built-in presets are locked, so Save New is the expected path when a built-in material has been adjusted for a particular production need.
| Action | Purpose | Notes |
|---|---|---|
| Apply Selected | Writes the selected preset into the current scene settings. | Use before manual tuning. |
| Save New | Creates a custom preset from current values. | Use after tuning a reusable behavior. |
| Update Selected | Updates the selected custom preset. | Locked built-in presets cannot be updated. |
| Delete Selected | Deletes the selected custom preset. | Locked built-in presets cannot be deleted. |
Meshify presets
Meshify presets fill the visible surface reconstruction settings.
The screenshots show Final Ultra, described in the interface as maximum quality. Treat it as a final-output preset rather than the fastest iteration preset.
| Preset type | Primary goal | Likely tradeoff |
|---|---|---|
| Preview | Fast feedback while testing simulation timing and general shape. | Lower surface fidelity. |
| Balanced | Useful quality while still iterating. | Moderate cost. |
| Final | High-quality surface generation. | Higher memory and compute cost. |
| Final Ultra | Maximum quality from the visible preset set. | Slowest and most expensive option. |
Whitewater FX presets
Whitewater FX (Beta) presets live in the Other tab and control only the secondary visual layer. They do not modify primary FLIP/APIC water, do not change pressure, and do not feed Meshify.
The recommended workflow is to enable Whitewater FX, choose a preset, and adjust only Amount, preview budget, or advanced emission, lifetime, buoyancy, and drag controls when the shot needs it. The preview budget limits how many secondary particles are sent to the viewport for interactivity, while the cache can preserve the full detail configured by the preset.
| Preset | Use for | Typical tradeoff |
|---|---|---|
| Light | Cheap previews while testing timing and broad motion. | Lowest secondary count. |
| Medium | Balanced demos and everyday review. | Moderate detail and viewport cost. |
| Heavy | Dense impact, wake, waterfall, or splash scenes. | Higher viewport and cache budget. |
| Cinematic | Render review or final shots where secondary detail sells the water. | Highest secondary density and cost. |
How this page can grow
Future preset groups may be organized by behavior family, production goal, scene scale, or learning path, while still linking back to the relevant parameter chapters.