2.8 - Particles in multi-level nested collections not visible #61976

New Issue

Dimitar P. · 2019-02-26T13:20:46+01:00

Dimitar P. commented

2019-02-26 13:20:46 +01:00

System Information
Operating system: win10x64
Graphics card: AMD Radeon Pro WX 7100

Blender Version
Broken: 2.80, 54ffc4e19d, 2019-02-25

Short description of error

In nested collections, objects with particles work only in two levels of nesting. Particles in further levels of nesting seem to ignore collections instancing.

Exact steps for others to reproduce the error

Related file: particle-instances.blend

create cones with hair particles on a collection called branches
create a cube on a collection called tree
add a collection instance of branches within the collection called tree (1st level of nesting of branches)
create a new collection called trees and add a few collection instances of tree.
for all objects in trees, the particles are visible ( 2nd level of nesting)
create a new collection called instances and add a collection instance of trees. Here, the particle settings are not replicated. (3rd level of nesting) .
For the sake of testing this further, create a new collection called instances2 and add a collection instance of instances . Also, here the particle settings are not replicated. (4th level of nesting)

In collection Instances, only the initial particles are visible and their location seems to be reset based on the initial location

**System Information** Operating system: win10x64 Graphics card: AMD Radeon Pro WX 7100 **Blender Version** Broken: 2.80, 54ffc4e19dc4, 2019-02-25 **Short description of error** In nested collections, objects with particles work only in two levels of nesting. Particles in further levels of nesting seem to ignore collections instancing. **Exact steps for others to reproduce the error** Related file: [particle-instances.blend](https://archive.blender.org/developer/F6717998/particle-instances.blend) - create cones with hair particles on a collection called **branches** ![image.png](https://archive.blender.org/developer/F6716938/image.png) - create a cube on a collection called **tree** ![image.png](https://archive.blender.org/developer/F6716962/image.png) - add a collection instance of branches within the collection called **tree** (1st level of nesting of branches) ![image.png](https://archive.blender.org/developer/F6716966/image.png) - create a new collection called **trees** and add a few collection instances of tree. - for all objects in trees, the particles are visible ( 2nd level of nesting) ![image.png](https://archive.blender.org/developer/F6716970/image.png) - create a new collection called **instances** and add a collection instance of trees. Here, the particle settings are not replicated. (3rd level of nesting) ![image.png](https://archive.blender.org/developer/F6716997/image.png). - For the sake of testing this further, create a new collection called **instances2** and add a collection instance of instances . Also, here the particle settings are not replicated. (4th level of nesting) ![image.png](https://archive.blender.org/developer/F6717008/image.png) In collection Instances, only the initial particles are visible and their location seems to be reset based on the initial location

blender-admin commented

2019-02-26 13:20:46 +01:00

#70300 was marked as duplicate of this issue

Dimitar P. commented

2019-02-26 13:20:47 +01:00

Added subscriber: @Dimitar

Dimitar P. changed title from ~~Particles in multi-level nested collections not visible~~ to 2.8 - Particles in multi-level nested collections not visible

2019-02-26 13:24:00 +01:00

Sebastian Parborg commented

2019-02-26 17:07:15 +01:00

Added subscriber: @ZedDB

Sebastian Parborg commented

2019-02-26 17:07:15 +01:00

Can you attach the .blend file?

Sergey Sharybin was assigned by Sebastian Parborg

2019-02-26 17:50:04 +01:00

Sebastian Parborg commented

2019-02-26 17:50:04 +01:00

Added subscriber: @Sergey

Sebastian Parborg commented

2019-02-26 17:50:04 +01:00

@Sergey feel free to reassign if this is not for you.

Sergey Sharybin removed their assignment 2019-02-26 18:24:42 +01:00

Brecht Van Lommel was assigned by Sergey Sharybin

2019-02-26 18:24:42 +01:00

Sergey Sharybin commented

2019-02-26 18:24:42 +01:00

Brecht is the master of (in)visibility and collections :)

Brecht Van Lommel commented

2019-10-02 23:47:35 +02:00

Added subscriber: @blenderhilfe

Nicolas Antille commented

2019-10-09 10:32:20 +02:00

Added subscriber: @nantille

Nicolas Antille commented

2019-10-09 10:34:42 +02:00

Does anyone have a suggestion for a workaround until this is solved?

Dalai Felinto commented

2019-10-10 23:36:05 +02:00

Added subscriber: @dfelinto

Dalai Felinto commented

2019-10-10 23:36:05 +02:00

@Dimitar (or even @nantille) could you tell if this happens with 2.79 as well or whether is a 2.80 specific issue?

Nicolas Antille commented

2019-10-11 10:49:28 +02:00

@dfelinto This is still an issue in latest master branch of Blender (2.81.14)

Dalai Felinto commented

2019-10-11 12:54:41 +02:00

@nantille I know, what I'm asking is about 2.79. So we know whether this is a regression or and old limitation

Nicolas Antille commented

2019-10-11 13:31:50 +02:00

@dfelinto Sorry I misread your question. I tested this in Blender 2.79 with the same problem. Attached is a sample file. The plane has a psys with Suzannes and then the same plane is used in another psys on the tree but Suzannes aren't duplicated alongside the plane.

b279_nested_particles_issue.blend

@dfelinto Sorry I misread your question. I tested this in Blender 2.79 with the same problem. Attached is a sample file. The plane has a psys with Suzannes and then the same plane is used in another psys on the tree but Suzannes aren't duplicated alongside the plane. ![b279_nested_psys_issue.png](https://archive.blender.org/developer/F7805749/b279_nested_psys_issue.png) [b279_nested_particles_issue.blend](https://archive.blender.org/developer/F7805738/b279_nested_particles_issue.blend)

Alex commented

2019-10-11 14:09:55 +02:00

Added subscriber: @SpectreFirst

Alex commented

2019-10-11 14:09:55 +02:00

I think I'm able to reproduce something like this as well but on my end it seems to work in 2.79 but in 2.81 particles seems to be duplicated at the wrong place. Here is how it looks on my end:
Nested Groups in 2.79

When you move objects around, particles stay where they are supposed to be.

In 2.81 particles seems to be missing.

But if you move objects around you will find out that particles were duplicated at the same place as they are on the second collection.

I think I'm able to reproduce something like this as well but on my end it seems to work in 2.79 but in 2.81 particles seems to be duplicated at the wrong place. Here is how it looks on my end: Nested Groups in 2.79 ![NestedGroups279.JPG](https://archive.blender.org/developer/F7805843/NestedGroups279.JPG) When you move objects around, particles stay where they are supposed to be. ![NestedGroups279particlesinplace.JPG](https://archive.blender.org/developer/F7805845/NestedGroups279particlesinplace.JPG) In 2.81 particles seems to be missing. ![NestedGroups281.JPG](https://archive.blender.org/developer/F7805847/NestedGroups281.JPG) But if you move objects around you will find out that particles were duplicated at the same place as they are on the second collection. ![NestedGroups281missingparticles.JPG](https://archive.blender.org/developer/F7805849/NestedGroups281missingparticles.JPG)

Brecht Van Lommel was unassigned by Dalai Felinto

2019-12-23 16:35:02 +01:00

Dalai Felinto commented

2019-12-23 16:35:02 +01:00

Added subscriber: @brecht

Philipp Oeser removed the

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2.8 - Particles in multi-level nested collections not visible #61976