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Description

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

Developers

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

Thu, Feb 14

Sergey Sharybin (sergey) added a comment to T61473: Blender crashes when moving object with hair or changing particle settings.

Weird. Was looking for quite some time =\ Thanks!

Thu, Feb 14, 3:54 PM · Physics, Dependency Graph, BF Blender
Philipp Oeser (lichtwerk) raised the priority of T61473: Blender crashes when moving object with hair or changing particle settings from Needs Information from User to Confirmed, Medium.

@Sergey Sharybin (sergey): file was there in the report (made this more visible now...)

Thu, Feb 14, 1:11 PM · Physics, Dependency Graph, BF Blender
Philipp Oeser (lichtwerk) updated the task description for T61473: Blender crashes when moving object with hair or changing particle settings.
Thu, Feb 14, 1:11 PM · Physics, Dependency Graph, BF Blender
Sergey Sharybin (sergey) lowered the priority of T61473: Blender crashes when moving object with hair or changing particle settings from Confirmed, Medium to Needs Information from User.

Please always attach .blend file which demonstrates the issue.

Thu, Feb 14, 10:11 AM · Physics, Dependency Graph, BF Blender

Wed, Feb 13

Brecht Van Lommel (brecht) closed T58617: particle render wrong (without baking) as Resolved.

This was fixed at some point.

Wed, Feb 13, 6:13 PM · Physics, BF Blender
Brecht Van Lommel (brecht) merged T58892: particle system reinit emitter into T58045: When changing particle type from Emitter to Hair and then back to Emitter, effect is missing.
Wed, Feb 13, 6:06 PM · BF Blender, Physics
Philipp Oeser (lichtwerk) assigned T61473: Blender crashes when moving object with hair or changing particle settings to Sergey Sharybin (sergey).

AddressSanitizer: heap-use-after-free P911

Wed, Feb 13, 12:02 PM · Physics, Dependency Graph, BF Blender
Philipp Oeser (lichtwerk) triaged T61473: Blender crashes when moving object with hair or changing particle settings as Confirmed, Medium priority.

Can reproduce here

Wed, Feb 13, 11:47 AM · Physics, Dependency Graph, BF Blender

Tue, Feb 12

Sergey Sharybin (sergey) closed T57589: 2.79 Rigid Body Sim. Does Not Behave The Same In 2.8 as Resolved.

Fixed by rB024f5ba2bdb.

Tue, Feb 12, 1:00 PM · BF Blender, Physics

Sat, Feb 9

Luca Rood (LucaRood) updated the task description for T56596: Cloth improvements in 2.8.
Sat, Feb 9, 2:13 AM · Physics, BF Blender: 2.8

Thu, Feb 7

Sebastian Parborg (zeddb) added a comment to T58208: Selecting particle system as Dynamic paint Brush crashes Blender.

So search, you go here: https://developer.blender.org/maniphest/
And click "Edit query" and put in your search terms in the "Query" field.

Thu, Feb 7, 11:48 AM · BF Blender, Physics
Sebastian Parborg (zeddb) closed T58208: Selecting particle system as Dynamic paint Brush crashes Blender as Resolved.

Sure you can report it.
Just have a nice minimal .blend file and a nice description :)

Thu, Feb 7, 11:47 AM · BF Blender, Physics
Sergey Sharybin (sergey) closed T53341: Weird bug with Particle Instance Modifier as Resolved.

Might be new dependency graph, might be fix in some other area. If the issue is fixed in blender2.8, i'd consider this resolved :)

Thu, Feb 7, 10:19 AM · Modifiers, Physics, Rendering, BF Blender
Steffen Dünner (SteffenD) added a comment to T53341: Weird bug with Particle Instance Modifier.

OK, just tried it and it works. New dependency graph?

Thu, Feb 7, 1:01 AM · Modifiers, Physics, Rendering, BF Blender
Sebastian Parborg (zeddb) added a comment to T53341: Weird bug with Particle Instance Modifier.

@Steffen Dünner (SteffenD) can you try 2.8 also?

Thu, Feb 7, 12:21 AM · Modifiers, Physics, Rendering, BF Blender
Steffen Dünner (SteffenD) added a comment to T53341: Weird bug with Particle Instance Modifier.

@Steffen Dünner (SteffenD), do you mind testing latest build from builder.blender.org?

Thu, Feb 7, 12:06 AM · Modifiers, Physics, Rendering, BF Blender

Wed, Feb 6

Sergey Sharybin (sergey) added a comment to T53341: Weird bug with Particle Instance Modifier.

@Steffen Dünner (SteffenD), do you mind testing latest build from builder.blender.org?

Wed, Feb 6, 9:23 PM · Modifiers, Physics, Rendering, BF Blender
Sebastian Parborg (zeddb) added a comment to T53341: Weird bug with Particle Instance Modifier.

@Sergey Sharybin (sergey) it seem like it can not longer reproduce the issue on my end with either blender 2.8 or blender 2.79 :S

Wed, Feb 6, 8:07 PM · Modifiers, Physics, Rendering, BF Blender
Ilari Männistö (Lattapotta) added a comment to T58208: Selecting particle system as Dynamic paint Brush crashes Blender.

I've followed your instructions and came up with this:

But setting the brush doesn't crash for me.
Is this still and issue for you?

Wed, Feb 6, 6:31 PM · BF Blender, Physics
Sergey Sharybin (sergey) added a comment to T53341: Weird bug with Particle Instance Modifier.

@Sebastian Parborg (zeddb), i can not reproduce the issue here, but i can currently only render on CPU. Does it happen when file is re-saved with CPU settings for you?

Wed, Feb 6, 4:25 PM · Modifiers, Physics, Rendering, BF Blender
Mal Duffin (mal_cando) edited projects for T58044: Issue with adding hair to rigid body, added: BF Blender: 2.8; removed BF Blender.
Wed, Feb 6, 11:18 AM · BF Blender: 2.8, Physics

Tue, Feb 5

Sebastian Parborg (zeddb) triaged T58208: Selecting particle system as Dynamic paint Brush crashes Blender as Needs Information from User priority.

I've followed your instructions and came up with this:

Tue, Feb 5, 8:56 PM · BF Blender, Physics
Sebastian Parborg (zeddb) assigned T53341: Weird bug with Particle Instance Modifier to Sergey Sharybin (sergey).

This seems to still be a problem with the latest blender 2.8 beta.

Tue, Feb 5, 1:33 PM · Modifiers, Physics, Rendering, BF Blender
Duarte Farrajota Ramos (duarteframos) added a watcher for Physics: Duarte Farrajota Ramos (duarteframos).
Tue, Feb 5, 10:44 AM

Mon, Feb 4

Mal Duffin (mal_cando) added a comment to T58044: Issue with adding hair to rigid body.

When in particle mode...

Mon, Feb 4, 5:33 PM · BF Blender: 2.8, Physics

Fri, Feb 1

shaun (toxsickcity) added a comment to T61046: Cloth from Blender 2.79 project file doesn't bake properly in blender 2.80 (Object Constraint Problem?).

I Can Verify that the New Nightly Build of 2.80
the cloth tests above are solved.

Fri, Feb 1, 4:53 AM · Physics, BF Blender

Thu, Jan 31

Sergey Sharybin (sergey) closed T61046: Cloth from Blender 2.79 project file doesn't bake properly in blender 2.80 (Object Constraint Problem?) as Resolved by committing rB9d10fc13e770: Fix T61046: Object with cloth jumps around.
Thu, Jan 31, 5:40 PM · Physics, BF Blender
Bastien Montagne (mont29) added a comment to T61046: Cloth from Blender 2.79 project file doesn't bake properly in blender 2.80 (Object Constraint Problem?).

This is also probably same general issue as T60451

Thu, Jan 31, 4:31 PM · Physics, BF Blender
Bastien Montagne (mont29) added a comment to T61046: Cloth from Blender 2.79 project file doesn't bake properly in blender 2.80 (Object Constraint Problem?).

@Sebastian Parborg (zeddb) sorry, looks like phab does not warn when you are saving updated description, that someone else changed the task in-between ;)

Thu, Jan 31, 4:30 PM · Physics, BF Blender
Sebastian Parborg (zeddb) assigned T61046: Cloth from Blender 2.79 project file doesn't bake properly in blender 2.80 (Object Constraint Problem?) to Sergey Sharybin (sergey).
Thu, Jan 31, 3:31 PM · Physics, BF Blender
Bastien Montagne (mont29) placed T61046: Cloth from Blender 2.79 project file doesn't bake properly in blender 2.80 (Object Constraint Problem?) up for grabs.
Thu, Jan 31, 3:03 PM · Physics, BF Blender
Sebastian Parborg (zeddb) added a comment to T61046: Cloth from Blender 2.79 project file doesn't bake properly in blender 2.80 (Object Constraint Problem?).

Might be related to (or dup of) T60836

Thu, Jan 31, 1:24 PM · Physics, BF Blender
Sebastian Parborg (zeddb) assigned T61046: Cloth from Blender 2.79 project file doesn't bake properly in blender 2.80 (Object Constraint Problem?) to Sergey Sharybin (sergey).
Thu, Jan 31, 1:23 PM · Physics, BF Blender
shaun (toxsickcity) added a project to T61046: Cloth from Blender 2.79 project file doesn't bake properly in blender 2.80 (Object Constraint Problem?): Physics.
Thu, Jan 31, 4:25 AM · Physics, BF Blender

Wed, Jan 30

Philipp Oeser (lichtwerk) renamed T60945: Force field + hair dynamics not working in (linked) instanced collections from Force field + hair dynamics not working with linked library to Force field + hair dynamics not working in (linked) instanced collections.
Wed, Jan 30, 11:22 AM · Datablocks and Libraries, Physics, BF Blender
Philipp Oeser (lichtwerk) added a comment to T60945: Force field + hair dynamics not working in (linked) instanced collections.

@Bastien Montagne (mont29): thx for explanation

Wed, Jan 30, 11:20 AM · Datablocks and Libraries, Physics, BF Blender
Bastien Montagne (mont29) updated subscribers of T60945: Force field + hair dynamics not working in (linked) instanced collections.

@Philipp Oeser (lichtwerk) that assert should for sure never be triggered, but in that case, it is caused by issue with brushes being saved in double or more (from userpref, iirc, @Campbell Barton (campbellbarton) knows the details and fixed the issue some days ago). So in that specific case, it is harmless, just means that the library reading code is only aware of one of the two brushes IDs sharing the same name… Re-saving the library with a recent build will fix that problem.

Wed, Jan 30, 11:13 AM · Datablocks and Libraries, Physics, BF Blender

Tue, Jan 29

Philipp Oeser (lichtwerk) raised the priority of T60945: Force field + hair dynamics not working in (linked) instanced collections from Needs Information from User to Confirmed, Medium.

Can confirm now.

Tue, Jan 29, 12:31 PM · Datablocks and Libraries, Physics, BF Blender
Andrew Williams (sobakasu) added a comment to T60963: Hair dynamics: hair dynamics not rendered in animation mode when using a force field.

I tried to simplify the steps to reproduce by adding an instance of the collection in the same file like you suggested. Then blender crashes when I try to render the animation.

Tue, Jan 29, 12:16 PM · Datablocks and Libraries, Physics, BF Blender
Andrew Williams (sobakasu) updated the task description for T60945: Force field + hair dynamics not working in (linked) instanced collections.
Tue, Jan 29, 12:06 PM · Datablocks and Libraries, Physics, BF Blender
Andrew Williams (sobakasu) updated the task description for T60945: Force field + hair dynamics not working in (linked) instanced collections.
Tue, Jan 29, 12:06 PM · Datablocks and Libraries, Physics, BF Blender
Andrew Williams (sobakasu) updated the task description for T60963: Hair dynamics: hair dynamics not rendered in animation mode when using a force field.
Tue, Jan 29, 12:03 PM · Datablocks and Libraries, Physics, BF Blender
Andrew Williams (sobakasu) added a comment to T60963: Hair dynamics: hair dynamics not rendered in animation mode when using a force field.

Yes, sorry I should have mentioned I linked in the collection.
I have not tried changing the link options. I have instance collections turned on.

Tue, Jan 29, 12:02 PM · Datablocks and Libraries, Physics, BF Blender
Philipp Oeser (lichtwerk) added a comment to T60945: Force field + hair dynamics not working in (linked) instanced collections.

Or: are you linking the collection? (with Instance Collection option)
[see related comment in T60963]

Tue, Jan 29, 11:15 AM · Datablocks and Libraries, Physics, BF Blender
Philipp Oeser (lichtwerk) triaged T60963: Hair dynamics: hair dynamics not rendered in animation mode when using a force field as Confirmed, Medium priority.

Confirming for now, will need some further investigation...

Tue, Jan 29, 10:59 AM · Datablocks and Libraries, Physics, BF Blender
Philipp Oeser (lichtwerk) triaged T60945: Force field + hair dynamics not working in (linked) instanced collections as Needs Information from User priority.

Cannot reproduce actually [in a build from today].

Tue, Jan 29, 9:38 AM · Datablocks and Libraries, Physics, BF Blender

Fri, Jan 25

Sergey Sharybin (sergey) closed T55460: Particle’s hair doesn’t update material dynamically, reflecting changes in the material as Resolved.

Works fine with the latest 2.80 Blender. So considering it resolved.

Fri, Jan 25, 4:37 PM · Physics, BF Blender

Thu, Jan 24

Sebastian Parborg (zeddb) added a comment to T60062: Memory leak on fluid simulation.

So this didn't work in 2.79? If it takes a lot less ram, then you probably have found a problem.

Thu, Jan 24, 7:53 PM · Physics, BF Blender
Vitaly Egorov (vitos23) closed T60062: Memory leak on fluid simulation as Resolved.

So, I found out that in my simulation there were two objects with ~30000 faces. I tried replace them with spheres and everything worked perfectly. Thanks for help. But I have the question - how many RAM PC mast have for blender working perfectly? 32GB is enough?

Thu, Jan 24, 7:24 PM · Physics, BF Blender
Bastien Montagne (mont29) lowered the priority of T59995: Mantaflow Review from Normal to Needs Information from User.
Thu, Jan 24, 6:08 PM · Physics, BF Blender