Simulation Nodes

Through the use of Simulation Zones, Geometry Nodes can be used to create custom physic simulations through nodes. Simulation zones allow the result of one frame to influence the next one. That way even a set of simple rules can lead to complex results, with the passing of time. The most common type of them is physics simulation, with specific solvers for physical phenomena.

See also

Read more about Simulation Zones

Baking

The simulation is automatically cached during playback. The valid cache can be seen as a strong yellow line in the timeline editor. This allows for animators to quickly inspect all the previous frames of a simulation.

../_images/modeling_geometry-nodes_simulation_baking_timeline.png

Cached frames in the Timeline.

When the result is ready to be sent to a render-farm, it can be baked to disk. This allows for the simulation to be rendered in a non-sequential order.

../_images/modeling_geometry-nodes_simulation_baking.png

Simulation and Physics, Geometry Nodes user interface.

Note

Baking the simulation will bake all the simulations in all modifiers for the selected objects.

Calculate to Frame

Calculate simulations in geometry nodes modifiers from the start to current frame.

Bake

Bake simulations in geometry nodes modifiers. In order to bake the simulation, the blend-file must be saved to your computer. The location the file is saved determines where the baked data is also saved. The directory the baked data is saved to can be changed per modifier in the Internal Dependencies.

Delete Cached Simulation

Delete cached/baked simulations in geometry nodes modifiers

Cache

For the cases where the current frame is the only one relevant, users can opt-out of caching the results to save memory.

Examples

Combined with the Index of Nearest, this can be used for a number of sphere-based simulations.

../_images/modeling_geometry-nodes_simulation_example.png

Index of Nearest sample file CC-BY Sean Christofferson.