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Particles Nodes
Confirmed, HighPublicTO DO

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Authored By
Dalai Felinto (dfelinto)
Jan 22 2020, 6:56 PM


Status: Core implementation on the way, need defined mvp/milestones to define if implementation will be in stages or in a single go.


Commissioner: @Brecht Van Lommel (brecht)
Project leader: @Jacques Lucke (JacquesLucke)
Project members: @Sebastián Barschkis (sebbas) @William Reynish (billreynish)


Big picture: Implement a stable (reliable) flexible node based particle system.

Use cases:

  • Motion-graph work that relies on time-based animations.
  • Set dressing of environment elements.
  • Generative weathering of surfaces.
  • Fireworks (particles that spawn new particles).
  • Dew drops on a leaf.


  • Re-usable effects
  • High level nodes out of the box
  • ? (mental model for different types of nodes)

Engineer plan:

  • C++ libraries in blenlib.
  • New builtin simulation node system.
  • The functions framework with a runtime type system for efficient evaluation of node trees.
  • The particles system that parses a particle node tree and performs the simulation.
Work plan

Milestone 1
Time estimate: 2-4 months

  • Particle nodes
    • Add Simulation node tree type
    • Add placeholders for built-in simulation nodes
    • Add placeholders for built-in function nodes
    • Define list of built-in nodes
    • Define list of group nodes to ship with Blender
    • Define categories and menu organization
    • Finalize naming of nodes and sockets
    • Support for storing ID pointers in sockets for object/image sockets
  • Explore different ways to visualize sockets and links of different type (
  • New Simulation data-block containing node tree and cache parameters
    • Basic implementation of ID type
    • Dependency graph and copy-on-write integration
  • Point cloud (basic) object type (@Brecht Van Lommel (brecht))
  • Modifier for point cloud copies simulated particles from simulation
  • Simulation caching
  • Functions nodes system
  • Particle solver capable of solving multiple particle simulations with emitters, events and forces (T77266)
  • Find system to ship node groups with Blender (asset system or if not ready, something temporary) (in branch currently)
  • Implement all built-in nodes

Milestone 2 - Feature completion

  • Use cases are supported (particle scattering, weathering, ...).

Unknown Milestone

  • Good collision handling in solver
  • Access any particle attribute in material
  • Access particle data from Python

Relevant links:

Event Timeline

Dalai Felinto (dfelinto) triaged this task as High priority.Jan 28 2020, 12:04 PM
michael campbell (3di) rescinded a token.
michael campbell (3di) rescinded a token.
michael campbell (3di) awarded a token.
Campbell Barton (campbellbarton) changed the task status from Needs Triage to Confirmed.Feb 12 2020, 8:24 AM
Gad (gadas) added a subscriber: Gad (gadas).
kd (Kdaf) added a subscriber: kd (Kdaf).