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Maniphest T69718

Particles: 'render as' collection does not render/display instances inside that collection
Confirmed, NormalPublicKNOWN ISSUE
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Description

System Information
Operating system: Windows 10 x64 Pro (1809, ver 10.0.17763.720)
Graphics card: Nvidia GTX 1060

Blender Version
Broken: Tested with 2.79b, 2.80 Release and 2.81 (f3a4f12ac090)
Short description of error
Particle emitter doesn't emit all group objects.

Exact steps for others to reproduce the error
Open the attached blend file:

  • At the top, there are 12 objects all belonging to group "LightString".
  • The bottom mesh contains 12 vertices. A particle system is attached. It should emit all 12 group objects at once.

Problem: Whatever I try, only 8 of the 12 group objects are shown.

Particles2.blend417 KBDownload

Related Objects

Event Timeline

Willi (willi) created this task.Sep 10 2019, 4:48 PM
Philipp Oeser (lichtwerk) lowered the priority of this task from 90 to 50.Sep 10 2019, 11:19 PM
Philipp Oeser (lichtwerk) added a project: Nodes & Physics.
Philipp Oeser (lichtwerk) added a subscriber: Philipp Oeser (lichtwerk).

Looks like instances (in the instance collection) are not shown (whereas "regular" objects are).
Actually their empties are drawn in the viewport, but their meshes are not.

From a quick glance at code it seems object_duplilist et al do the right thing, needs further investigation...
(This might be a known limitation that I am not aware of...)

Philipp Oeser (lichtwerk) renamed this task from Particle emitter does not emit all group objects to Particles: 'render as' collection does not render/display instances inside that collection.Sep 10 2019, 11:21 PM
Philipp Oeser (lichtwerk) mentioned this in T70046: Linked Instanced collections are not being displayed in the viewport with Local collections enabled.Sep 19 2019, 9:53 AM
Dalai Felinto (dfelinto) added a project: Tracker Curfew.Dec 23 2019, 1:51 PM
Philipp Oeser (lichtwerk) changed the subtype of this task from "Report" to "Known Issue".Jan 23 2020, 3:05 PM
Philipp Oeser (lichtwerk) removed a project: Tracker Curfew.

Actually their empties are drawn in the viewport, but their meshes are not.

Since 2.81, the empties are also not drawn anymore...

2.79 also behaved the same, and since the particle system is seeing a refactor, will classify as "Known Issue"

James Horsley (mmdanggg2) added a subscriber: James Horsley (mmdanggg2).Oct 21 2020, 2:07 PM

Just run up against this, bit of a roadblock for a workflow I was hoping to use with linked collections.
Simplest test case:


The instanced collections within the collection just don't show, they do 'use up' the particle count though.

Dalai Felinto (dfelinto) moved this task from Backlog to Known Issues on the Nodes & Physics board.Mar 2 2021, 11:28 AM