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PhysicsProject
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Details

Description

Physics simulation systems including rigid bodies, cloth, softbodies, smoke fluids and particles.

Superseded by Nodes & Physics.

Developers

This list is for historical reasons, note these developers were no longer active when this project was archived.

Bullet: @Erwin Coumans (erwin)
Rigid Body: @Sergej Reich (sergof)
Cloth: @Daniel Genrich (genscher)
Smoke: @Miika Hamalainen (miikah) @Daniel Genrich (genscher)
Fluids: @Daniel Genrich (genscher) @Nils Thuerey (n_t)
Particles: @Janne Karhu (jhk) @Lukas Toenne (lukastoenne)
Softbody: @Jens Ole Wund(bjornmose) (bjornmose)

Recent Activity

Wed, Jun 8

zhixiong.zhang (Blender_Cool) added a comment to T56818: Hair Dynamics does not work for all strands when hair has been cut.

The problem has not been improved

Wed, Jun 8, 11:28 AM · Physics, Animation & Rigging, BF Blender
zhixiong.zhang (Blender_Cool) added a comment to T56818: Hair Dynamics does not work for all strands when hair has been cut.

New hair system Will it break away from the particle system.

Wed, Jun 8, 11:26 AM · Physics, Animation & Rigging, BF Blender
Omar Emara (OmarSquircleArt) added a comment to T56818: Hair Dynamics does not work for all strands when hair has been cut.

@zhixiong.zhang (Blender_Cool) It means it is no longer in active development and will not receive future updates.

Wed, Jun 8, 11:20 AM · Physics, Animation & Rigging, BF Blender
zhixiong.zhang (Blender_Cool) added a comment to T56818: Hair Dynamics does not work for all strands when hair has been cut.

"given that the particle system is marked as End of Life" What does this sentence mean?

Wed, Jun 8, 11:14 AM · Physics, Animation & Rigging, BF Blender
Omar Emara (OmarSquircleArt) added a comment to T56818: Hair Dynamics does not work for all strands when hair has been cut.

@zhixiong.zhang (Blender_Cool) Those issues will likely be solved in the new system, yes.

Wed, Jun 8, 10:56 AM · Physics, Animation & Rigging, BF Blender
zhixiong.zhang (Blender_Cool) added a comment to T56818: Hair Dynamics does not work for all strands when hair has been cut.

Will the new hair system in blender3.2 replace the current hair, and after that, will the hair dynamics problem be solved?

Wed, Jun 8, 10:53 AM · Physics, Animation & Rigging, BF Blender
Omar Emara (OmarSquircleArt) merged T98657: Blender hair dynaimic error? into T56818: Hair Dynamics does not work for all strands when hair has been cut.
Wed, Jun 8, 10:38 AM · Physics, Animation & Rigging, BF Blender

Fri, Jun 3

Jonathan Benton (vinegarshots) added a comment to T46776: Particles: Kink options for Curve Guides broken since 2.69.

Can you just hide the Kink menu from the user, then? All of the non-functional/broken features in Blender that still have a functional UI element makes for a very messy, confusing user experience....

Fri, Jun 3, 9:20 PM · Physics, BF Blender

May 24 2022

RMK (r.m.k) added a comment to T93535: Particles on Faces/Volumes with grid does not respect zero gravity.

Any update on this?

May 24 2022, 8:43 AM · Nodes & Physics, Physics, BF Blender

May 16 2022

Hans Goudey (HooglyBoogly) removed a project from T66307: Nodes & Physics Module: Nodes.
May 16 2022, 11:15 AM · Nodes & Physics, Physics, BF Blender
Donovane (Stimes) added a comment to T66307: Nodes & Physics Module.
May 16 2022, 5:07 AM · Nodes & Physics, Physics, BF Blender

May 9 2022

Dalai Felinto (dfelinto) changed the subtype of T88418: Duplicating a passive body can make the child meshes not update from "Report" to "Known Issue".

Thanks for the report. Marking this as known issue since it depends on the rigid body system which at the moment has no active developer. I'm tagging Sergej here anyways in case he wants to tackle any of those. Anyone wlse interested on that can also join the geometry nodes meetings to get onboarded.

May 9 2022, 3:28 PM · BF Blender, Nodes & Physics, Physics
Dalai Felinto (dfelinto) changed the subtype of T91369: Frequent crashes when performing minor adjustments with rigid body constraints from "Report" to "Known Issue".

Thanks for the report. Marking this as known issue since it depends on the rigid body system which at the moment has no active developer. I'm tagging Sergej here anyways in case he wants to tackle any of those. Anyone wlse interested on that can also join the geometry nodes meetings to get onboarded.

May 9 2022, 3:28 PM · Nodes & Physics, Physics, BF Blender
Dalai Felinto (dfelinto) changed the subtype of T69870: Adaptive Domain causing 'twitches' in gas position when noise applied from "Bug" to "Known Issue".

Mantaflow (fluid simulator) has no active developer at the moment. Moving those bugs as known issues so at least other users can find their issues already reported.

May 9 2022, 11:03 AM · Physics, BF Blender
Dalai Felinto (dfelinto) changed the subtype of T73130: Viewport display broken for fire- solid and rendered mode (Cycles & Eevee) from "Bug" to "Known Issue".

Mantaflow (fluid simulator) has no active developer at the moment. Moving those bugs as known issues so at least other users can find their issues already reported.

May 9 2022, 11:03 AM · Physics, BF Blender
Dalai Felinto (dfelinto) changed the subtype of T73232: Mantaflow: Adaptive Domain breaks Dissolve if 'slow' is checked from "Bug" to "Known Issue".

Mantaflow (fluid simulator) has no active developer at the moment. Moving those bugs as known issues so at least other users can find their issues already reported.

May 9 2022, 11:02 AM · Nodes & Physics, Physics, BF Blender
Dalai Felinto (dfelinto) changed the subtype of T73921: Eevee volume render test memory leak in Mantaflow from "Bug" to "Known Issue".

Mantaflow (fluid simulator) has no active developer at the moment. Moving those bugs as known issues so at least other users can find their issues already reported.

May 9 2022, 11:02 AM · Physics, Nodes & Physics, BF Blender
Dalai Felinto (dfelinto) changed the subtype of T84287: [Mantaflow] Fluid volume loss with moving obstacle. from "Bug" to "Known Issue".

Mantaflow (fluid simulator) has no active developer at the moment. Moving those bugs as known issues so at least other users can find their issues already reported.

May 9 2022, 11:01 AM · Physics, Nodes & Physics, BF Blender
Dalai Felinto (dfelinto) changed the subtype of T86512: Force fields don't work on a fire simulation with Flame Smoke 0 from "Report" to "Known Issue".

Mantaflow (fluid simulator) has no active developer at the moment. Moving those reports as known issues so at least other users can find their issues already reported.

May 9 2022, 10:59 AM · Physics, Nodes & Physics, BF Blender
Dalai Felinto (dfelinto) changed the subtype of T89431: mantaflow instability on high timesteps from "Report" to "Known Issue".

Mantaflow (fluid simulator) has no active developer at the moment. Moving those reports as known issues so at least other users can find their issues already reported.

May 9 2022, 10:59 AM · Physics, Nodes & Physics, BF Blender

Apr 28 2022

Philipp Oeser (lichtwerk) merged T95583: Particals stop rendering on the last frame into T68290: Baked particles dont render in final frame.
Apr 28 2022, 10:35 AM · Nodes & Physics, Physics, BF Blender

Apr 18 2022

Germano Cavalcante (mano-wii) updated the task description for T55362: Blender development todo list -- Tools (migrated from wiki).
Apr 18 2022, 8:26 PM · Core, BF Blender, Images & Movies, Pipeline, Assets & I/O, Modeling, Compositing, Physics, Sculpt, Paint & Texture

Apr 16 2022

Jacob Merrill (blueprintrandom) added a comment to T94036: RBD collisions ignore geometry nodes deformation.

upbge has a method - to construct a physics shape from the evaluated geometry in bullet

Apr 16 2022, 1:40 AM · Physics, Nodes & Physics, Geometry Nodes, BF Blender
Hans Goudey (HooglyBoogly) merged task T94036: RBD collisions ignore geometry nodes deformation into T91183: RBD sim ignores mesh (cloth) deformation.
Apr 16 2022, 1:21 AM · Physics, Nodes & Physics, Geometry Nodes, BF Blender
Hans Goudey (HooglyBoogly) added a comment to T94036: RBD collisions ignore geometry nodes deformation.

Thanks for the report. I have hope that the elusive more general simulation system will solve problems like this.
In the meantime, I don't think the issue with the current rigid body system is likely to be solved unfortunately.
At least I don't think it's worth having two similar reports for it anyway. I'll merge this with T91183.

Apr 16 2022, 1:21 AM · Physics, Nodes & Physics, Geometry Nodes, BF Blender

Apr 14 2022

Campbell Barton (campbellbarton) closed T68290: Baked particles dont render in final frame as Resolved by committing rB405bff7fd8ed: Fix T68290: Baked particles don't render in final frame.
Apr 14 2022, 8:58 AM · Nodes & Physics, Physics, BF Blender
Campbell Barton (campbellbarton) merged T81253: Particle cache misses last frame into T68290: Baked particles dont render in final frame.
Apr 14 2022, 7:46 AM · Nodes & Physics, Physics, BF Blender

Apr 10 2022

Donovane (Stimes) added a comment to T68981: New curves object type.
Apr 10 2022, 10:59 AM · Nodes & Physics, BF Blender

Apr 7 2022

Kévin Dietrich (kevindietrich) updated the task description for T68981: New curves object type.
Apr 7 2022, 8:56 AM · Nodes & Physics, BF Blender
Pratik Borhade (PratikPB2123) merged T97114: Bake all dynamics does not bake last frame of frame range [Even though it appears at first so!] into T68290: Baked particles dont render in final frame.
Apr 7 2022, 5:27 AM · Nodes & Physics, Physics, BF Blender

Mar 23 2022

Hans Goudey (HooglyBoogly) updated the task description for T68981: New curves object type.
Mar 23 2022, 6:49 PM · Nodes & Physics, BF Blender
Hans Goudey (HooglyBoogly) updated the task description for T68981: New curves object type.
Mar 23 2022, 5:16 PM · Nodes & Physics, BF Blender
Jacques Lucke (JacquesLucke) renamed T68981: New curves object type from New hair object type to New curves object type.
Mar 23 2022, 4:43 PM · Nodes & Physics, BF Blender
Brecht Van Lommel (brecht) updated the task description for T68981: New curves object type.
Mar 23 2022, 2:05 PM · Nodes & Physics, BF Blender
Brecht Van Lommel (brecht) updated the task description for T68981: New curves object type.
Mar 23 2022, 2:02 PM · Nodes & Physics, BF Blender

Mar 19 2022

Isaac (Gicheha) added a comment to T68981: New curves object type.
Mar 19 2022, 9:15 AM · Nodes & Physics, BF Blender

Feb 21 2022

Omar Emara (OmarSquircleArt) closed T85212: Mantaflow instability as Archived.

Thanks for the detailed report! We split this report to multiple simpler reports in T89431 and T95928. We will track each report individually in its task.

Feb 21 2022, 11:32 AM · Physics, Nodes & Physics, BF Blender

Feb 18 2022

Richard Antalik (ISS) merged T91227: Cloth cache bug into T70631: Cache of cloth simulation is not read by blender after reopening the file (pre-roll).
Feb 18 2022, 9:48 PM · Physics, BF Blender

Feb 16 2022

Germano Cavalcante (mano-wii) merged T90703: Smoke is trembling into T69870: Adaptive Domain causing 'twitches' in gas position when noise applied.
Feb 16 2022, 8:52 PM · Physics, BF Blender

Feb 10 2022

Omar Emara (OmarSquircleArt) closed T89662: Baking partikel sim. after smoke sim. baking -> ultra slow as Archived.

If you have a smoke simulation already baked, then baking a point cloud will also involve evaluating the smoke simulation as well, which can be seen in the execution profile. Maybe this could be optimized if there is no dependency between the two. But this does not look like a bug.

Feb 10 2022, 2:25 PM · Physics, BF Blender
Omar Emara (OmarSquircleArt) changed the status of T88418: Duplicating a passive body can make the child meshes not update from Needs Triage to Confirmed.

I can replicate that. Duplicating a passive object and then changing it to active will cause the object to be in a bad state, changing any property of the object makes it update to its valid state.

Feb 10 2022, 8:31 AM · BF Blender, Nodes & Physics, Physics

Feb 3 2022

Richard Antalik (ISS) merged task T94394: Volume blocky through glas into T94425: Volume artifacts when transparent interfaces are in front, and issues with Min Light and Transparency Bounces .
Feb 3 2022, 9:00 AM · Physics, Nodes & Physics, Render & Cycles, Cycles, BF Blender
Richard Antalik (ISS) added a comment to T94394: Volume blocky through glas.

@Fernando Alcala (TriFractal) Thanks for clarification, I can see this much better with higher resolution. Will merge this report then.

Feb 3 2022, 9:00 AM · Physics, Nodes & Physics, Render & Cycles, Cycles, BF Blender
Fernando Alcala (TriFractal) added a comment to T94394: Volume blocky through glas.

It's because you simulated it at a lower resolution, making the blocks almost fill the hourglass. As I mentioned in the detailed report, this matters.

Feb 3 2022, 7:11 AM · Physics, Nodes & Physics, Render & Cycles, Cycles, BF Blender
Richard Antalik (ISS) added a comment to T94394: Volume blocky through glas.

I guess I could merge this report, but I am not sure whether it is equivalent - I can reproduce T94425, but not this one.

Feb 3 2022, 3:37 AM · Physics, Nodes & Physics, Render & Cycles, Cycles, BF Blender

Feb 2 2022

Fernando Alcala (TriFractal) added a comment to T94394: Volume blocky through glas.

You should merge this report to T94425, I describe the issue better there. And I can still reproduce on the latest 3.1 beta and 3.2 alpha.

Feb 2 2022, 4:26 AM · Physics, Nodes & Physics, Render & Cycles, Cycles, BF Blender
Richard Antalik (ISS) changed the status of T94394: Volume blocky through glas from Needs Triage to Needs Information from User.

@HEYPictures (HEYPictures) I checked with few builds, from older 3.1 to latest and can't reproduce this issue. Can you check if it happens with latest alpha?

Feb 2 2022, 3:08 AM · Physics, Nodes & Physics, Render & Cycles, Cycles, BF Blender

Jan 27 2022

Philipp Oeser (lichtwerk) changed the status of T85212: Mantaflow instability from Needs Information from User to Needs Triage.
Jan 27 2022, 9:09 AM · Physics, Nodes & Physics, BF Blender

Jan 21 2022

Philipp Oeser (lichtwerk) closed T95108: Rigid Body and Fluid Simulation Coupling for realistic interactions (possible MantaFlow implementation/addon) as Archived.

Mantaflow: maybe not.
But a new system for physics is on the roadmap for this year, see https://code.blender.org/2022/01/strategic-targets-2022/

Jan 21 2022, 3:14 PM · Game Physics, Physics, Add-ons (Community)
Cedric Möller (glutton) created T95108: Rigid Body and Fluid Simulation Coupling for realistic interactions (possible MantaFlow implementation/addon).
Jan 21 2022, 3:00 PM · Game Physics, Physics, Add-ons (Community)