Questions tagged [collections]

For questions relating the to the new 2.8 "layer" system and collection management

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How to get all collection in current scene?

I'm trying to get all the collections within the current scene. But the problem is the following, if I use for col in bpy.data.collections: I will get all the ...
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1answer
36 views

How to re-link collections to scene

To clean up my scene, I used Right-Click > Unlink in the Outliner, but now I want the collections back. I can find them by switching to the Blender File context in the Outliner, but the Right-Click > ...
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1answer
36 views

Exclude feature in blender 2.82

I can't find the "Set Exclude" feature in 2.82 as shown in this answer. Did they move it, if so where is it?
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1answer
27 views

How to prevent the intersection of mesh particles

So I know this has been asked before, but the most recent article I could find was over a year ago so I am curious if this has been fixed. I created the scene below by simply weight painting a ...
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1answer
20 views

Can I affect the particle frequency of objects in a collection?

So I have a scene that I am working on below. Currently I have only one type of tree simulated across the entire surface, but I want 3 different types instead. However I do not want an equal mix of ...
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1answer
141 views

Create a Collection inside another Collection with python

How to create a Collection inside another existing Collection with Python?
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Is it possible to recursively instance objects from a collection?

I have a donut model that is a collection of two objects, one for icing, and one for the actual donut. The icing object uses a hair particle system to instance a set of sprinkles objects from another ...
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16 views

How to make Blender respect object viewport visibility when appending or linking?

When you link or append a collection to a file, all objects become visible in a viewport, even if they were originally hidden in source file. Strangely enought, render visibility is respected, while ...
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19 views

How to make Blender 2.8 remember collections Outliner state when i save and reopen the file?

If you create bunch of collections and arrange them in outliner, you "close" some of them and "open" others (with little arrow left to the collection name in Outliner), save the file, exit and open ...
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1answer
34 views

adding an obj to new layer in blender 2.79 and linking the existing object to the new collection in blender 2.8 same?

I was following a tutorial for fish animation. In the tutorial they are adding a plane and adding that plane into separate layers. Then all operations are performed on that plan. So in Blender 2.8 how ...
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23 views

Understanding blender collection, instancing from Sketchup side of view [duplicate]

I'm trying to migrate to Blender from Sketchup. There, instancing is managed simply by 'group' and 'component'. Groups are just separate coordinate system while components make object an instance. ...
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1answer
48 views

Disable collection on all layers except one?

I have 10 layers and every time I make a new collection I have to click on each layer to exclude collection from every layer. For example, I created collection on layer 1 and need it to be enabled ...
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6 views

How to offset an animation of a linked collection? (linked from another blend file)

I have two files, the first is the render scene with a building, the second contains a scaled up animation of a drilling process with particles and smoke. I can link that animation as a collection, ...
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1answer
34 views

Modify the visibility of collections locally to the viewport with python

We have a project with 2 viewports in the same interface. We need an operator that can click on one of the viewports and change the visibility of some collections locally in the viewport that has been ...
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7 views

Export nested scene collection titles with python

Is there a way to export a nested scene collection using python Tabs for nesting or so. I need to describe a large project
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15 views

How to add a library override for bpy.data?

I'm looking for a way to add Library Overrides over linked elements from bpy.data on Blender 2.81. Seems it's possible to add ...
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22 views

Why does adding an object to a collection with Python not remove it from its old collection?

I'm really new to Blender, and want to script an octahedron with all parts neatly placed inside its own collection. But somehow, when I create a new collection and link objects to my newly created ...
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17 views

Easy way to unlink, relink, switch link, for object or collection ..?

Is there a way on blender to easily transform a collection linked from another .blend file into a list of objects in a collection, while keeping the separation of each object, with the right scale, ...
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1answer
73 views

How to access linked objects from a linked collection? (Blender 2.8)

How can I access the linked objects inside a linked collection on Blender 2.8? Inside the view layer navigator I cannot see the ...
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20 views

Converting addon to 2.8 - Replacing obj.layers in a 2.79 method

The 2.79 method is this one: - ...
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1answer
22 views

Is there a hotkey for moving whole collections around?

pretty basic question: Does anyone know of an easy way to select a collection and use a hotkey to move it to it's desired location? I have tried a lot of different ways involving (M, ctrl + M, ctrl +...
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0answers
27 views

Object “Grouping” - delete children with parent

I'm writing a Blender (2.81) Python Addon which needs to display one mesh in the Viewport (low res) and one for Rendering (high res) (these are plants/trees). I currently create two objects and use ...
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20 views

Move object (or collection) to placeholder

How can I move an object (or collection of objects, I imagine is mostly the same solution) to fit inside a place holder defined with a mesh cube inside the scene? ...
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1answer
19 views

Duplicating / copy collections (unlinked) in 2.81 from one scene to another scene

I'm trying to copy everything in a collection (I don't want them linked) called Camera.001 from one scene to another scene (the second scene is in the same blender file). But I notice that when I ...
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45 views

Selecting Collections

In the older versions of blender, you could group objects and they would be treated like one object. In blender 2.8, groups have been replaced with collections. The collections are not treated as one ...
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1answer
24 views

Duplicating collections in 2.81 not copying everything

I'm trying to copy everything in a collection (I don't want them linked) called Camera.001 from one scene to another scene (the second scene is in the same blender file). But I notice that when I ...
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12 views

Update method doesn't fire

Does someone know/see why the update_file method in this code doesn't fire? ...
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Freestyle behind not affected object

I am new at blender an experimenting with some functions. When I use freestyle on a collection it is all working fine. But with the text object in the foreground (in an other collection) and "...
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17 views

How to find a collection property index in an update method

I'm trying to use collections inside my addon. I have: ...
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12 views

Constrain effect of force field to a collection for Rigid Bodies

Back in 2.79b the influence of a force field was constrained to it's layer. That allowed effects like in this .blend created in 2.79b. Two objects with rigid body enabled and two force fields. When ...
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1answer
27 views

I have a large scene with a hierarchy of nested Empties. I need to select and delete all the objects under Empties with a specific name

I'm new to blender. I'm struggling with what seems like it should be a very simple task. I have a large scene(a level imported from a game) that has a lot(hundreds) of nested emptys, and geometry ...
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2answers
34 views

How do you undisable in viewport all object in a collection?

I have a complex scene I moved from 2.79 to 2.81. What makes it complex is that it has lots of objects as childs of other objects. Think complex folder tree. Basically hundred folders and each have ...
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9 views

is there a way to enable disable collections with driver or script?

Is there any script that does this? i cant place drivers on a collection so i thought a script would do the job... not necessarily a driver adding one but something i can control with a property value ...
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1answer
37 views

Can't see added cube on my scene collection [duplicate]

When I select add and then cylinder, cube or whatever, then I can't see the cube on my collection side menu on the right. I want to do some booleans from the air intake seen in screenshot 2. That's ...
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1answer
207 views

'bpy_prop_collection' object has no attribute 'link'?

I'm using Blender 2.8+ and I found a web page containing a nice python script to generate a labyrinth. I copied the script in Blenders text editor and an error occurred at line 88: ...
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33 views

How to limit light to a collection? Formerly (2.79) it was 'Limit to this layer'

How to limit light to a collection? Formerly (2.79) it was 'Limit to this layer'. I have a lot of blend-files where I have object and lights in layers and the lights are limited to that layer. With ...
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9 views

Linked duplicate a group of objects, with future new objects and constraints also duplicated?

Suppose that I have a group of objects that represents an "airplane engine". I do not yet have the entire engine modeled, and may want to add more objects/constraints/physics properties/etc. to it. ...
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19 views

Animating multiple objects together?

Seems like a stupid question, but in 2.8 (2.82), how do I animate a whole collection together in one transformation (all stuck together)? If I multiselect all the objects and some are instanced to ...
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1answer
43 views

How to get modifiers of instanced objects to to refer to their respective object?

When I instance 2 objects, one having a modifier that refers to the other, if I make the instances real, the modifiers don't refer to their respective object. I tried every approach I could think of: -...
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2answers
83 views

Blender Python: Exclude Collections from View Layers [duplicate]

I would like to replicate in a script what happens if i exclude a collection from a view layer via hotkey E (bpy.ops.outliner.collection_exclude_set()). I cannot seem to find that exclude in the tree....
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1answer
91 views

Can't add objects to collections

I'm a super-beginner to this (and 3D animation in general) so please forgive me if this is a really obvious things I'm missing as I work my way through tutorials for Blender 2.8, but I can't find the ...
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20 views

Child object on different render layer?

I'm learning about compositing from an old pre-2.8x tutorial. The tutorial shows that an object parented to another object can be moved to a different view layer, which is then used by render layer to ...
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1answer
138 views

How to add a modifier to a collection?

My goal is to reduce the faces of an object using the decimate modifier. The object I'm editing has lots of vertex groups. Blender 2.8 only lets me add the decimate modifier to a single group at once ...
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0answers
11 views

The particles that are emitted from my object are all over the place

So I'm trying to have grass grow from a rock. I have a collection with two different patches of grass that I am using to cover my rock. Although, when I created my particle system, the patches of ...
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17 views

Export to DXF, convert each object to separate layer

I have imported an OBJ file into blender, After modyfing the objects in blender i want to export the file as DXF and have each object under the collection be a layer. Currently, when exporting to ...
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2answers
20 views

Can not select object in other collection

I'm using Blender 2.8 (Windows 10). I have two collections. One With a plane that I would like to hold a projection of an image I would like to convert into an object. The other collection with the ...
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1answer
23 views

How to keep parts of single object easily selectable in 2.8?

I have a humanoid character, and I want to be able to select and move it's parts (like the hand highlighted on the photo) easily - that is without having to select all their vertices/faces all the ...
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2answers
81 views

Python collection_duplicate() help

Is it possible to duplicate a collection from a Python script? When I do it manually, the Console shows bpy.ops.outliner.collection_duplicate(), however if I call ...
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4answers
207 views

Sorting Collections Alphabetically in the Outliner

I have numerous objects categories that I used to organize in Groups through a script in Blender 2.79. I'm now trying to switch to blender 2.8 and use collections, but in the outliner the only ...
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54 views

Particle collections: how to keep a sphere inside a sphere?

I am trying to use the particle system with a collection that consists of two spheres that are concentrical but different in size, in other words a small pink sphere inside a transparent larger sphere....