Cloth modifier acts erratically #60836

New Issue

Thierry · 2019-01-24T21:32:47+01:00

Thierry commented

2019-01-24 21:32:47 +01:00

System Information
Operating system: WIN10 64
Graphics card: GeForce GTX 560 Ti and another GeForce GTX 560 Ti - SLI disabled (like for 2.79b who use them perfectly without SLI)

Blender Version
Broken:
blender-2.80.0-git.1d908bffddb4-windows64
Worked: (optional)
2.79b-windows64

Short description of error
Cloth modifier acts erratically, do not stand still when it should, tremble or make quick movements + message : "No compatible GPUs found" in Blender Preferences - Cycles Render Devices

Exact steps for others to reproduce the error
Just run animation

Mr Frite me Jiggle.blend

**System Information** Operating system: WIN10 64 Graphics card: GeForce GTX 560 Ti and another GeForce GTX 560 Ti - SLI disabled (like for 2.79b who use them perfectly without SLI) **Blender Version** Broken: blender-2.80.0-git.1d908bffddb4-windows64 Worked: (optional) 2.79b-windows64 **Short description of error** Cloth modifier acts erratically, do not stand still when it should, tremble or make quick movements + message : "No compatible GPUs found" in Blender Preferences - Cycles Render Devices **Exact steps for others to reproduce the error** Just run animation [Mr Frite me Jiggle.blend](https://archive.blender.org/developer/F6392747/Mr_Frite_me_Jiggle.blend)

Thierry commented

2019-01-24 21:32:47 +01:00

Added subscriber: @Thierrylomenede

Thierry commented

2019-01-24 21:34:36 +01:00

Cloth modifier acts erratically, do not stand still when it should, tremble or make quick movements + message : "No compatible GPUs found" in Blender Preferences - Cycles Render Devices

Jacques Lucke commented

2019-01-25 12:42:46 +01:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2019-01-25 12:42:46 +01:00

Could you please be more specific about the movement you mean? The orange character in the beginning? And where is the cloth modifier?

Can you try to remove everything that is not necessary to reproduce the bug?

Could you please be more specific about the movement you mean? The orange character in the beginning? And where is the cloth modifier? Can you try to remove everything that is not necessary to reproduce the bug?

Thierry commented

2019-01-25 20:59:35 +01:00

(Sorry) OK so (new files added)

in "Mr Frite me Jiggle1.blend"

Each bone (in "Armatures" collection) have a "stretch to" bone constraint to a vertex group of a four edges geometry with cloth physics (in "Edges with cloth sim" collection)

All bones and geometries have the same propriety (copy) but when supposed to be idle (no animation) they don't stay idle at all, all in a different way, like "glitches" or something...

in "Mr Frite me Jiggle1 - Copie" with Alembic "Mr Frite me Jiggle1 - Copie.abc" in

You can see what I mean by erratically as you run the animation

Thank you{F6403011}

Mr Frite me Jiggle1.blend

Mr Frite me Jiggle1 - Copie.blend

(Sorry) OK so (new files added) - > in "Mr Frite me Jiggle1.blend" Each bone (in "Armatures" collection) have a "stretch to" bone constraint to a vertex group of a four edges geometry with cloth physics (in "Edges with cloth sim" collection) All bones and geometries have the same propriety (copy) but when supposed to be idle (no animation) they don't stay idle at all, all in a different way, like "glitches" or something... - > in "Mr Frite me Jiggle1 - Copie" with Alembic "Mr Frite me Jiggle1 - Copie.abc" in You can see what I mean by erratically as you run the animation Thank you{[F6403011](https://archive.blender.org/developer/F6403011/Mr_Frite_me_Jiggle1_-_Copie.abc)} [Mr Frite me Jiggle1.blend](https://archive.blender.org/developer/F6403012/Mr_Frite_me_Jiggle1.blend) [Mr Frite me Jiggle1 - Copie.blend](https://archive.blender.org/developer/F6403013/Mr_Frite_me_Jiggle1_-_Copie.blend)

Thierry commented

2019-01-25 21:07:56 +01:00

Mr Frite me Jiggle1 - Copie - Copie.blend
please rename "Mr Frite me Jiggle1 - Copie - Copie.blend" in "Mr Frite me Jiggle1 - Copie.abc"

[Mr Frite me Jiggle1 - Copie - Copie.blend](https://archive.blender.org/developer/F6403065/Mr_Frite_me_Jiggle1_-_Copie_-_Copie.blend) please rename "Mr Frite me Jiggle1 - Copie - Copie.blend" in "Mr Frite me Jiggle1 - Copie.abc"

Sebastian Parborg commented

2019-01-30 17:49:40 +01:00

Added subscriber: @ZedDB

Sebastian Parborg commented

2019-01-30 17:49:40 +01:00

This doesn't seem to be cloth sim related, it seems to be more about the Stretch To bone constraint. In Mr Frite me Jiggle1.blend, just to show case that this is not cloth related, remove the cloth sim on all four objects.

Next, select the left most armature Armature.004, go into pose mode and select the first bone (named Bone) with the Stretch To constraint. Click and drag on the influence bar. Notice that the bone snaps to the position of the initial mesh and back again.

This doesn't seem to be cloth sim related, it seems to be more about the `Stretch To` bone constraint. In `Mr Frite me Jiggle1.blend`, just to show case that this is not cloth related, remove the cloth sim on all four objects. Next, select the left most armature `Armature.004`, go into pose mode and select the first bone (named `Bone`) with the `Stretch To` constraint. Click and drag on the influence bar. Notice that the bone snaps to the position of the initial mesh and back again.

Sergey Sharybin was assigned by Sebastian Parborg

2019-01-30 18:15:01 +01:00

Sergey Sharybin commented

2019-01-30 18:30:56 +01:00

@ZedDB, mind uploading simplified .blend, with all the unrelated parts removed, and proper bone selected?