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Nodes & PhysicsProject
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Description

This projects includes function nodes, dependency graph, rigid body, particles & hair, cloth, fluid & smoke (mantaflow), softbody, node editor and more.

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Recent Activity

Yesterday

Richard Antalik (ISS) merged T78859: Hair and Rigid Body into T77685: Object position calculated in the Rigidbody simulation is ignored by the modifiers.
Mon, Jul 13, 8:30 PM · Modifiers, Physics, Nodes & Physics, BF Blender
Jacques Lucke (JacquesLucke) added a revision to T77766: Simulations don't take animated global gravity toggle into account: D8281: Fix T77766: support animated global gravity toggle.
Mon, Jul 13, 4:48 PM · Nodes & Physics, Physics, BF Blender
Sebastián Barschkis (sebbas) added a comment to T76687: [Mantaflow] low domain transformation performance.

@Germano Cavalcante (mano-wii) Yes, the check for that flag seemed like a good idea to me too!

Mon, Jul 13, 4:18 PM · Physics, Nodes & Physics, BF Blender
Jacques Lucke (JacquesLucke) changed the subtype of T77766: Simulations don't take animated global gravity toggle into account from "Report" to "Bug".
Mon, Jul 13, 4:17 PM · Nodes & Physics, Physics, BF Blender
Sebastián Barschkis (sebbas) closed T76687: [Mantaflow] low domain transformation performance as Resolved by committing rB952279a36678: Fix T76687: [Mantaflow] low domain transformation performance.
Mon, Jul 13, 4:16 PM · Physics, Nodes & Physics, BF Blender
Jacques Lucke (JacquesLucke) changed the status of T77831: Mantaflow (GAS) motion blur doesn't work. from Confirmed to Needs Information from User.

Can you simplify the file more, please, or build a new one that shows the issue from scratch? I assume the torus objects, the particles, etc. are not really necessary to see the bug?
Fixing the issue would be easier if the .blend file is as simple as possible.

Mon, Jul 13, 3:37 PM · Nodes & Physics, BF Blender
Jacques Lucke (JacquesLucke) changed the subtype of T78243: Mantaflow: changing 'upres' value for noise destroys sim bake (using 'modular' cache) from "Report" to "Bug".
Mon, Jul 13, 3:15 PM · Nodes & Physics, BF Blender
Jacques Lucke (JacquesLucke) merged task T77713: Mantaflow (GAS). The cache is deleted when the Upres factor of noise is switched. into T78243: Mantaflow: changing 'upres' value for noise destroys sim bake (using 'modular' cache).
Mon, Jul 13, 3:14 PM · Nodes & Physics, BF Blender
Jacques Lucke (JacquesLucke) merged T77713: Mantaflow (GAS). The cache is deleted when the Upres factor of noise is switched. into T78243: Mantaflow: changing 'upres' value for noise destroys sim bake (using 'modular' cache).
Mon, Jul 13, 3:14 PM · Nodes & Physics, BF Blender
Jacques Lucke (JacquesLucke) changed the status of T78290: Mantaflow smoke simulation render looks different in 2.82 and 2.83 from Confirmed to Needs Information from User.

Can you provide a side by side comparison of the old and new behaviors? Please also show how it looks like in Blender 2.90.
A 6 minute long video is too long to be useful here.

Mon, Jul 13, 3:12 PM · Nodes & Physics, BF Blender
Jacques Lucke (JacquesLucke) changed the subtype of T78598: No fluid particles created when switching from gas to liquid from "Report" to "Bug".
Mon, Jul 13, 2:58 PM · Nodes & Physics, BF Blender
Jacques Lucke (JacquesLucke) changed the subtype of T78599: Eevee incorrect motion blur Mantaflow liquid from "Report" to "Bug".
Mon, Jul 13, 2:50 PM · Nodes & Physics, EEVEE & Viewport, BF Blender
Jacques Lucke (JacquesLucke) added a comment to T78599: Eevee incorrect motion blur Mantaflow liquid.

This might be related to D7862.

Mon, Jul 13, 2:50 PM · Nodes & Physics, EEVEE & Viewport, BF Blender
Jacques Lucke (JacquesLucke) updated subscribers of T78738: Mantaflow - Enabling "Noise" breaks fast-moving smoke.

I cannot see the smoke after baking the noise either...
I can see the issue when setting the cache type to "All" though.

Mon, Jul 13, 2:25 PM · Nodes & Physics, BF Blender
Gabriele Guido (pampi2703) added a comment to T74763: Mantaflow: Animating smoke color affects existing smoke.

Ok thanks for the explanation. I wish you good work!💪

Mon, Jul 13, 9:29 AM · Nodes & Physics, BF Blender
Iago Diogo Vasconcelos Mota (IagoMota) added a comment to T74763: Mantaflow: Animating smoke color affects existing smoke.

Oh, thanks for reminding me to check this one! Unfortunately, it looks like it got more complicated. In both 2.83.2 and 2.9 Alpha (f319eec88186), the bug is gone when it's simulated using Replay type cache (though with several glitches before the first keyframe, probably related to caching). But when it's simulated in Modular or Final/All, the bug is still there. The color changes won't be visible in the viewport, but, if rendered in Cycles, the whole plume of smoke changes color at once, instead of just the newly emitted smoke.

Mon, Jul 13, 4:24 AM · Nodes & Physics, BF Blender

Sun, Jul 12

Gabriele Guido (pampi2703) added a comment to T74763: Mantaflow: Animating smoke color affects existing smoke.

Has this and the T74078 have been solved in a new Release?

Sun, Jul 12, 6:17 PM · Nodes & Physics, BF Blender

Thu, Jul 9

Germano Cavalcante (mano-wii) closed T75110: Crash when Baking Fluid Particles as Invalid.

The amount of written data for this simulation is absurd. It reached almost 50 GB in the HD before I cancel.

Thu, Jul 9, 7:47 PM · Nodes & Physics, BF Blender
Bastien Montagne (mont29) closed T78718: Crash when deleting particle system modifier with the X Shortcut as Resolved by committing rB8ddf7556a512: Fix T78718: Crash when deleting particle system modifier with the X Shortcut..
Thu, Jul 9, 11:53 AM · Nodes & Physics, BF Blender
Bastien Montagne (mont29) added a comment to T78718: Crash when deleting particle system modifier with the X Shortcut.

This has nothing to do with Data, Assets & I/O project really, just bad code in handling of that modifier/psys.

Thu, Jul 9, 11:40 AM · Nodes & Physics, BF Blender
Bastien Montagne (mont29) removed a project from T78718: Crash when deleting particle system modifier with the X Shortcut: Data, Assets & I/O.
Thu, Jul 9, 11:40 AM · Nodes & Physics, BF Blender
Ankit (ankitm) changed the status of T78738: Mantaflow - Enabling "Noise" breaks fast-moving smoke from Needs Information from User to Confirmed.
Thu, Jul 9, 11:37 AM · Nodes & Physics, BF Blender
Ankit (ankitm) added a comment to T78705: VDB Import missing noise cache.

To avoid the export, import process, create a quick smoke simulation. Verify that smoke visible in viewport. Enable noise, bake noise, smoke is gone.
Came across this while testing T78738: Mantaflow - Enabling "Noise" breaks fast-moving smoke

Thu, Jul 9, 11:37 AM · Nodes & Physics, BF Blender
Bastien Montagne (mont29) added a comment to T78718: Crash when deleting particle system modifier with the X Shortcut.

Well, basically copying code is doing everything wrong it can do for that modifier... TBH particle system modifier is a weirdo, always needs its own custom handling.

Thu, Jul 9, 11:36 AM · Nodes & Physics, BF Blender
adrien (adcdsb) updated the task description for T78705: VDB Import missing noise cache.
Thu, Jul 9, 8:13 AM · Nodes & Physics, BF Blender
Richard Antalik (ISS) added a project to T78705: VDB Import missing noise cache: Nodes & Physics.

@Sebastián Barschkis (sebbas) is this limitation or is there any workflow to follow?

Thu, Jul 9, 7:27 AM · Nodes & Physics, BF Blender
Richard Antalik (ISS) renamed T78599: Eevee incorrect motion blur Mantaflow liquid from Eevee motion blur - problem with Mantaflow liquid to Eevee incorrect motion blur Mantaflow liquid.
Thu, Jul 9, 5:37 AM · Nodes & Physics, EEVEE & Viewport, BF Blender
Gary Oberbrunner (garyo123) added a comment to T78624: Crash when baking particles using python.

It's super easy to repro:

Thu, Jul 9, 3:53 AM · Python API, Nodes & Physics, BF Blender
Daniel Bystedt (dbystedt) updated the task description for T78515: Hair object - Node types design.
Thu, Jul 9, 1:48 AM · Nodes & Physics

Wed, Jul 8

Fernando Alcala (TriFractal) added a comment to T76356: Very slow performance when copying rigid body physics.

2.83
I too have encountered this problem.
Some testing I did:
1 rigid to 50 objs = 0m:16s
1 rigid to 100 objs = 0m:33s
1 rigid to 150 objs = 0m:49s
1 rigid to 200 objs = 1m:07s
1 rigid to 250 objs = 1m:23s
1 rigid to 500 objs = 2m:58s
1 rigid to 1000 objs = 5m:52s
1 rigid to 2000 objs = 12m:02s
1 rigid to 5000 objs = 36m:52s

Wed, Jul 8, 11:11 PM · Performance, Dependency Graph, Nodes & Physics, BF Blender
Ankit (ankitm) changed the status of T78646: image_user.frame_duration = 100 when creating single image node in Cycles from Needs Triage to Confirmed.
Wed, Jul 8, 10:31 PM · Nodes & Physics, BF Blender
Evandro Costa (Arkhangels) added a comment to T78556: Inconsistent behavior in Dynamic Paint when moving Canvas towards Brush (keyed vs unkeyed).

Thanks for checking the issue as well Richard!
If it happens to be the case that this is due to a technical limitation, I'd appreciate if you would advise me if creating a feature/improvement request on the proper venues would be helpful, or worthless, in case this is a part of Blender code that is not and would not be so easily changed. Thanks!

Wed, Jul 8, 9:44 PM · Nodes & Physics, BF Blender
Germano Cavalcante (mano-wii) updated the task description for T77955: Exploding fabric in cloth simulation .
Wed, Jul 8, 8:34 PM · Nodes & Physics, BF Blender
Germano Cavalcante (mano-wii) changed the status of T77955: Exploding fabric in cloth simulation from Needs Triage to Confirmed.

Cloth simulation has a known problem when the minimum response distance from the self collision is greater than the length of the edge of the mesh.
However, in the attached file, even setting a smaller value for the minimum distance, the problem is still seen.
This is an indication of a different problem.

Wed, Jul 8, 8:33 PM · Nodes & Physics, BF Blender
Martijn Versteegh (Baardaap) updated the task description for T78598: No fluid particles created when switching from gas to liquid.
Wed, Jul 8, 7:47 PM · Nodes & Physics, BF Blender
Bastien Montagne (mont29) reopened T78718: Crash when deleting particle system modifier with the X Shortcut as "Confirmed".

Meh, wrong task number in commit message :(

Wed, Jul 8, 6:10 PM · Nodes & Physics, BF Blender
Bastien Montagne (mont29) closed T78718: Crash when deleting particle system modifier with the X Shortcut as Resolved by committing rBe4926c167bac: Fix T78718: Crash when deleting particle system modifier with the X Shortcut..
Wed, Jul 8, 6:09 PM · Nodes & Physics, BF Blender
Richard Antalik (ISS) changed the status of T78598: No fluid particles created when switching from gas to liquid from Needs Triage to Confirmed.
Wed, Jul 8, 3:16 AM · Nodes & Physics, BF Blender
Richard Antalik (ISS) changed the status of T78593: Objects are not distorted by hair particle curves from Confirmed to Needs Information from User.

Oops did not want to confirm yet.

Wed, Jul 8, 3:06 AM · Nodes & Physics, BF Blender
Richard Antalik (ISS) renamed T78593: Objects are not distorted by hair particle curves from [Bug] Objects are not distorted by hair particle curves to Objects are not distorted by hair particle curves.
Wed, Jul 8, 2:45 AM · Nodes & Physics, BF Blender
Richard Antalik (ISS) changed the status of T78593: Objects are not distorted by hair particle curves from Needs Triage to Confirmed.
Wed, Jul 8, 2:44 AM · Nodes & Physics, BF Blender
Richard Antalik (ISS) changed the status of T78556: Inconsistent behavior in Dynamic Paint when moving Canvas towards Brush (keyed vs unkeyed) from Needs Triage to Confirmed.

I think this is because grabbing canvas will invalidate dynamic paint cache. Since this is working in 2.79 I will confirm, but this may be technical limitation of cache system so it may not be a bug.

Wed, Jul 8, 1:14 AM · Nodes & Physics, BF Blender
Richard Antalik (ISS) updated the task description for T78556: Inconsistent behavior in Dynamic Paint when moving Canvas towards Brush (keyed vs unkeyed).
Wed, Jul 8, 1:10 AM · Nodes & Physics, BF Blender

Tue, Jul 7

Germano Cavalcante (mano-wii) merged T78645: Mantaflow Adaptive Domain & Noise Crash into T78270: Mantaflow - Noise Bake with Adaptive Domain Crashes Blender.
Tue, Jul 7, 10:09 PM · Nodes & Physics, BF Blender
Germano Cavalcante (mano-wii) merged task T78645: Mantaflow Adaptive Domain & Noise Crash into T78270: Mantaflow - Noise Bake with Adaptive Domain Crashes Blender.
Tue, Jul 7, 10:09 PM · Nodes & Physics, BF Blender
Germano Cavalcante (mano-wii) merged T78569: Blender crashes when trying to bake "Noise" with Adaptive Domain using Mantaflow into T78645: Mantaflow Adaptive Domain & Noise Crash.
Tue, Jul 7, 10:06 PM · Nodes & Physics, BF Blender
Germano Cavalcante (mano-wii) merged task T78569: Blender crashes when trying to bake "Noise" with Adaptive Domain using Mantaflow into T78645: Mantaflow Adaptive Domain & Noise Crash.
Tue, Jul 7, 10:06 PM · Nodes & Physics, BF Blender
Germano Cavalcante (mano-wii) changed the status of T78645: Mantaflow Adaptive Domain & Noise Crash from Needs Triage to Confirmed.
Tue, Jul 7, 10:06 PM · Nodes & Physics, BF Blender
Robert Guetzkow (rjg) edited projects for T78718: Crash when deleting particle system modifier with the X Shortcut, added: Data, Assets & I/O; removed Modifiers.
Tue, Jul 7, 8:26 PM · Nodes & Physics, BF Blender
Robert Guetzkow (rjg) changed the status of T78718: Crash when deleting particle system modifier with the X Shortcut from Needs Triage to Confirmed.
psys_emitter_customdata_mask(ParticleSystem * psys, CustomData_MeshMasks * r_cddata_masks) Line 1953	C
requiredDataMask(Object * UNUSED_ob, ModifierData * md, CustomData_MeshMasks * r_cddata_masks) Line 104	C
BKE_modifier_calc_data_masks(Scene * scene, Object * ob, ModifierData * md, CustomData_MeshMasks * final_datamask, int required_mode, ModifierData * previewmd, const CustomData_MeshMasks * previewmask) Line 573	C
mesh_calc_modifiers(Depsgraph * depsgraph, Scene * scene, Object * ob, int useDeform, const bool need_mapping, const CustomData_MeshMasks * dataMask, const int index, const bool use_cache, const bool allow_shared_mesh, Mesh * * r_deform, Mesh * * r_final) Line 951	C
mesh_build_data(Depsgraph * depsgraph, Scene * scene, Object * ob, const CustomData_MeshMasks * dataMask, const bool need_mapping) Line 1805	C
makeDerivedMesh(Depsgraph * depsgraph, Scene * scene, Object * ob, BMEditMesh * em, const CustomData_MeshMasks * dataMask) Line 1920	C
BKE_object_handle_data_update(Depsgraph * depsgraph, Scene * scene, Object * ob) Line 194	C
BKE_object_eval_uber_data(Depsgraph * depsgraph, Scene * scene, Object * ob) Line 385	C
Tue, Jul 7, 8:24 PM · Nodes & Physics, BF Blender