Page MenuHome

PhysicsProject
ActivePublic

Details

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

Yesterday

Philipp Oeser (lichtwerk) closed T55105: Smoke Emission from particles is ignoring lattice deformer on the particles as Resolved by committing rBd542e55b096b: Fix T55105: Smoke Emission from particles was ignoring lattice deformer on the….
Tue, Dec 18, 3:10 PM · Physics, BF Blender

Mon, Dec 17

William Reynish (billreynish) added a comment to T59509: Particle rotation bug.

No worries - this area is not so easy to control. Particle nodes FTW :)

Mon, Dec 17, 9:53 PM · Physics, Dependency Graph, BF Blender: 2.8
user1 (user1) changed the status of T59509: Particle rotation bug from Resolved to Invalid.

I found the issue, but it is too embarrassing to tell. Sorry 1000 times!

Mon, Dec 17, 9:52 PM · Physics, Dependency Graph, BF Blender: 2.8
user1 (user1) closed T59509: Particle rotation bug as Resolved.
Mon, Dec 17, 9:51 PM · Physics, Dependency Graph, BF Blender: 2.8
user1 (user1) added a comment to T59509: Particle rotation bug.

@William Reynish (billreynish) Please use my blendfile and tell me if you can do them upright in 2.8. My particles aren't objects but groups (collections).

Mon, Dec 17, 9:46 PM · Physics, Dependency Graph, BF Blender: 2.8
William Reynish (billreynish) triaged T59509: Particle rotation bug as Incomplete priority.

I can't really reproduce. This was the case in 2.79 too.

Mon, Dec 17, 9:41 PM · Physics, Dependency Graph, BF Blender: 2.8
user1 (user1) updated the task description for T59509: Particle rotation bug.
Mon, Dec 17, 9:31 PM · Physics, Dependency Graph, BF Blender: 2.8
user1 (user1) created T59509: Particle rotation bug.
Mon, Dec 17, 9:26 PM · Physics, Dependency Graph, BF Blender: 2.8
Bastien Montagne (mont29) merged T59463: The adaptive domain shifts the simulation. into T58492: smoke flow jitters around flow source when using adaptive domain.
Mon, Dec 17, 10:46 AM · BF Blender, Physics

Fri, Dec 14

Bastien Montagne (mont29) closed T58005: Crash when Brush Collection in the same Collection as Ocean+DynamicPaintCanvas as Resolved.

Cannot reproduce the crash anymore either, thanks for the head up, closing.

Fri, Dec 14, 3:59 PM · BF Blender, Physics
Björn Eckhardt (Modicolitor) added a comment to T58005: Crash when Brush Collection in the same Collection as Ocean+DynamicPaintCanvas.

seems to be fixed in the latest builds. my example blend (see description) is not crashing anymore. Probably try on another system, confirm and delete this task.

Fri, Dec 14, 1:31 PM · BF Blender, Physics

Thu, Dec 13

Artūrs Ontužāns (Ontuzhan) added a comment to T59209: While rendering animation, physics simulations are not applied in render..

With baked physics it works.
So now you are supposed to bake physics before rendering it. In previous versions, it was not mandatory to bake physics for animation render.

Thu, Dec 13, 1:36 PM · BF Blender, Physics, Animation
MartinR (mares) added a comment to T59209: While rendering animation, physics simulations are not applied in render..

Maybe this helps:
I had a similar issue a few weeks ago, and somebody on blenderexchange gave me the hint: You need to Bake the physics before starting the render. Otherwise it will not show in render.
Have you baked the physics?

Thu, Dec 13, 1:08 PM · BF Blender, Physics, Animation

Wed, Dec 12

Brecht Van Lommel (brecht) edited projects for T59209: While rendering animation, physics simulations are not applied in render., added: BF Blender; removed BF Blender: 2.8.
Wed, Dec 12, 6:12 PM · BF Blender, Physics, Animation
Brecht Van Lommel (brecht) merged T59252: quick smoke tool bad result. into T58492: smoke flow jitters around flow source when using adaptive domain.
Wed, Dec 12, 4:36 PM · BF Blender, Physics
Bastien Montagne (mont29) closed T59193: Crash with SIGSEGV in DEG::DepsgraphRelationBuilder::build_rigidbody(Scene*) () while running python script in 2.80b as Resolved.

Please follow our submission template and guidelines, also read these tips about bug reports, and make a complete, valid bug report, with required info, precise description of the issue (only ONE issue per report!), precise steps to reproduce it, small and simple .blend and/or other files to do so if needed, etc.

Wed, Dec 12, 11:19 AM · Physics, BF Blender
Everton Schneider (eversimo) added a comment to T58045: When changing particle type from Emitter to Hair and then back to Emitter, effect is missing.

Same issue reported on T58892.
Ok, I'm not sure if I'm allowed to do this here... let me know...
I have tested this one and I found that to solve this you need to change particle type manually. When you change the particle type to hair the particle type is set to "path" on "render as" option in the render dropdown inside the particle system. You need to set the particles to halo again and they will show up in the viewport again.

Wed, Dec 12, 3:10 AM · BF Blender, Physics

Tue, Dec 11

Artūrs Ontužāns (Ontuzhan) created T59209: While rendering animation, physics simulations are not applied in render..
Tue, Dec 11, 9:24 PM · BF Blender, Physics, Animation
Bastien Montagne (mont29) claimed T58492: smoke flow jitters around flow source when using adaptive domain.
Tue, Dec 11, 7:12 PM · BF Blender, Physics
Bastien Montagne (mont29) added a comment to T58492: smoke flow jitters around flow source when using adaptive domain.

Well, in most cases we want to keep texspace from orig mesh (i.e. not take into account changes from modifier stack). Otherwise, you get fluctuating texturing when modifiers change bounds of the geometry. So question here is: do we want/need to make an exception for domain of smoke sim (and maybe others? Though iirc fluid e.g. generated geometry, not a 3D texture…)?

Tue, Dec 11, 7:12 PM · BF Blender, Physics
Clément Foucault (fclem) added a comment to T58492: smoke flow jitters around flow source when using adaptive domain.

So this is not a drawing issue. The texspace should be set accordingly for the adaptive domains (which is only valid on the evaluated mesh since it changes size).

Tue, Dec 11, 6:43 PM · BF Blender, Physics
Stephen Swaney (stiv) merged T59166: Adaptive domain into T58492: smoke flow jitters around flow source when using adaptive domain.
Tue, Dec 11, 5:09 AM · BF Blender, Physics

Mon, Dec 10

Sergey Sharybin (sergey) closed T57633: Particle texture update problem as Resolved by committing rBc2b0d8b6d6c7: Fix T57633: Particle texture update problem.
Mon, Dec 10, 3:12 PM · Physics, BF Blender: 2.8
Bastien Montagne (mont29) closed T58993: Duplicating after setting a rigid body world crashes Blender as Resolved by committing rB073a011f91a5: Fix T58993: Duplicating after setting a rigid body world crashes Blender..
Mon, Dec 10, 3:10 PM · Physics, BF Blender: 2.8
Bastien Montagne (mont29) claimed T58993: Duplicating after setting a rigid body world crashes Blender.
Mon, Dec 10, 2:10 PM · Physics, BF Blender: 2.8

Sun, Dec 9

Bastien Montagne (mont29) merged T59092: Setting Dynamic Paint brush as particle crashes when selecting a particle system into T59059: Blender crashing after adding particle system and dynamic paint (Brush).
Sun, Dec 9, 10:59 PM · Physics, BF Blender: 2.8, BF Blender
Bastien Montagne (mont29) closed T59059: Blender crashing after adding particle system and dynamic paint (Brush) as Resolved by committing rBd7ef1af22bf4: Fix T59059: Blender crashing after adding particle system and dynamic paint….
Sun, Dec 9, 9:50 PM · Physics, BF Blender: 2.8, BF Blender
Bastien Montagne (mont29) claimed T59059: Blender crashing after adding particle system and dynamic paint (Brush).

Well, following those exact steps, it also crashes for me with current master (and 2.8 too).

Sun, Dec 9, 10:15 AM · Physics, BF Blender: 2.8, BF Blender

Sat, Dec 8

Bastien Montagne (mont29) merged T58996: Smoke Simulation With Adaptive Domain into T58492: smoke flow jitters around flow source when using adaptive domain.
Sat, Dec 8, 4:13 PM · BF Blender, Physics
xanadou (xanadou) closed T58880: display fragments as Invalid.

I agree! I'll change the status to Invalid.

Sat, Dec 8, 11:01 AM · Physics, BF Blender
Sebastian Parborg (zeddb) added a comment to T58880: display fragments.

If it is indeed a driver issue, there is not much we can do.

Sat, Dec 8, 10:57 AM · Physics, BF Blender
xanadou (xanadou) added a comment to T58880: display fragments.


There are different types of fragments.

Sat, Dec 8, 10:47 AM · Physics, BF Blender
xanadou (xanadou) added a comment to T58880: display fragments.


I just managed to take a screenshot of a fragment.

Sat, Dec 8, 10:44 AM · Physics, BF Blender
xanadou (xanadou) added a comment to T58880: display fragments.

But it's actually very likely, that the driver is the actual problem.

Sat, Dec 8, 10:35 AM · Physics, BF Blender
xanadou (xanadou) added a comment to T58880: display fragments.

I'm not able to change my drivers right now and I'll probably can't do it ever, because I'll change to another system soon.

Sat, Dec 8, 10:32 AM · Physics, BF Blender
Sebastian Parborg (zeddb) added a comment to T58880: display fragments.

Did you try the latest drivers available for your card?

Sat, Dec 8, 10:29 AM · Physics, BF Blender
xanadou (xanadou) added a comment to T58880: display fragments.

The fragments still happen in the latest build, but it seems impossible to capture a screenshot of them, eventhough they keep reoccuring.

Sat, Dec 8, 10:27 AM · Physics, BF Blender
Nacho Campillos (NachoCruje) added a comment to T58061: Blender 2.8 crashes when trying to use "Particle Edit" on MACOS "Still crashes".

The same here. Any attempt to enter in "Particle Edit" closes the software immediately. This with the last Beta, and with the previous Beta, and the alphas too.

Sat, Dec 8, 9:22 AM · BF Blender, Physics
Nacho Campillos (NachoCruje) added a comment to T56437: Crash when entering Particle Edit mode.

The same here. Any attempt to enter in "Particle Edit" closes the software immediately. This with the last Beta, and with the previous Beta, and the alphas too.

Sat, Dec 8, 9:22 AM · BF Blender, Physics

Fri, Dec 7

Timo (atf-productions) added a comment to T38387: Particle Info Node doesn't work for particle systems which have Children enabled.

Any updates?

Fri, Dec 7, 11:21 PM · Physics, BF Blender, Cycles
Sergey Sharybin (sergey) closed T58632: Particle don't update rotation settings as Resolved by committing rB79312c1912b4: Depsgraph: Remove duplicated sets of recalc/update flags.
Fri, Dec 7, 11:43 AM · Dependency Graph, Physics, BF Blender: 2.8
Philipp Oeser (lichtwerk) closed T58046: Crash when changing Particle type, when Hair has dynamics as Resolved by committing rB41e4059f3c41: Fix T58046: Crash when changing Particle type, when Hair has dynamics.
Fri, Dec 7, 10:56 AM · Physics, BF Blender: 2.8
Brecht Van Lommel (brecht) closed T58750: Missing tooltip for forcefield setting "Falloff/Power" as Resolved by committing rB497a9ef7a396: Fix T58750: missing fallof power tooltip..
Fri, Dec 7, 1:18 AM · Physics, User Interface, BF Blender: 2.8

Thu, Dec 6

user1 (user1) added a comment to T58750: Missing tooltip for forcefield setting "Falloff/Power".

roger :)

Thu, Dec 6, 9:53 PM · Physics, User Interface, BF Blender: 2.8
Sebastian Parborg (zeddb) added a comment to T58750: Missing tooltip for forcefield setting "Falloff/Power".

We do not close this now. We will close it when my patch has been accepted or if it is decided to keep it as it is now.

Thu, Dec 6, 9:40 PM · Physics, User Interface, BF Blender: 2.8
user1 (user1) added a comment to T58750: Missing tooltip for forcefield setting "Falloff/Power".

Does that mean i have to close the thread now? Sorry if my question sound silly. I'm still learning. I read your tooltip. Like that formula part.

Thu, Dec 6, 9:32 PM · Physics, User Interface, BF Blender: 2.8
Brecht Van Lommel (brecht) triaged T58880: display fragments as Incomplete priority.

Before getting into drivers, please show a screenshot of the artifacts. It may be a duplicate or temporary glitch that is already fixed in the latest build.

Thu, Dec 6, 8:49 PM · Physics, BF Blender
Sebastian Parborg (zeddb) added a comment to T58880: display fragments.

I put in your card on the nvidia website (or so I hope) and got this link:
https://www.nvidia.com/Download/driverResults.aspx/120732/en-us
Your driver seems to be a bit older:
https://www.nvidia.com/download/driverResults.aspx/99994/en

Thu, Dec 6, 8:46 PM · Physics, BF Blender
Sebastian Parborg (zeddb) claimed T58750: Missing tooltip for forcefield setting "Falloff/Power".

I've submitted a fix: D4042

Thu, Dec 6, 8:35 PM · Physics, User Interface, BF Blender: 2.8
Sebastian Parborg (zeddb) added a revision to T58750: Missing tooltip for forcefield setting "Falloff/Power": D4042: Fix T58750, add missing force field falloff tooltip.
Thu, Dec 6, 8:34 PM · Physics, User Interface, BF Blender: 2.8