# \#instance **URL:** https://forums.unrealengine.com/tag/instance/1171.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [Unique ID for actor instances for saving](https://forums.unrealengine.com/t/unique-id-for-actor-instances-for-saving/2776185)
**Author:** [@KMzuru](https://forums.unrealengine.com/u/KMzuru)\ **Replies:** 7\ **Last updated:** [September 16, 2026, 11:33am UTC](https://forums.unrealengine.com/t/unique-id-for-actor-instances-for-saving/2776185 "2026-09-16T11:33:20Z")
Thought I’d ask here as I need help asap, I’m looking to generate unique ID’s for each instance of actors so I am able to save picked up objects. It is going to be used to save what items have been picked up, so I can sa… --- ## [How to Check If Level Instance Inside BPLI Is Loaded?](https://forums.unrealengine.com/t/how-to-check-if-level-instance-inside-bpli-is-loaded/2724331)
**Author:** [@WaterLord7788](https://forums.unrealengine.com/u/WaterLord7788)\ **Replies:** 4\ **Last updated:** [May 28, 2026, 5:16pm UTC](https://forums.unrealengine.com/t/how-to-check-if-level-instance-inside-bpli-is-loaded/2724331 "2026-05-28T17:16:08Z")
I am creating a procedurally generating level, where I have a main Blueprint called “BP\_LevelGenerator” that generates chunks - using a known chunk’s exits to get a new chunk’s spawn location, pretty simple logic. The ch… --- ## [How can i use RotateAboutAxis node in material editor with Instances?](https://forums.unrealengine.com/t/how-can-i-use-rotateaboutaxis-node-in-material-editor-with-instances/2684555)
**Author:** [@kurylo3d](https://forums.unrealengine.com/u/kurylo3d)\ **Replies:** 23\ **Last updated:** [December 14, 2025, 6:39pm UTC](https://forums.unrealengine.com/t/how-can-i-use-rotateaboutaxis-node-in-material-editor-with-instances/2684555 "2025-12-14T18:39:48Z")
In my material, RotateaAboutAxis with world position works great to rotate an airconditioner fan mesh around its pivot point. But it wont work right with instances. The only temp solution i have is to use custom primitiv… --- ## [Best Practice For Open World Optimisation? - Stalker 2 ZoneKit analysis](https://forums.unrealengine.com/t/best-practice-for-open-world-optimisation-stalker-2-zonekit-analysis/2591864)
**Author:** [@Hambo1994](https://forums.unrealengine.com/u/Hambo1994)\ **Replies:** 0\ **Last updated:** [July 5, 2025, 2:49pm UTC](https://forums.unrealengine.com/t/best-practice-for-open-world-optimisation-stalker-2-zonekit-analysis/2591864 "2025-07-05T14:49:08Z")
Hello All, Looking at the newly released Stalker 2 ZoneKit I noticed that they appear to utilise custom prefab actors and tools, and all of their actors in the actual game world are packed into API’s (ActorPackedInstanc… --- ## [Is there a way to expose this "Bone to Modify" as a pin or make it skeleton agnostic?](https://forums.unrealengine.com/t/is-there-a-way-to-expose-this-bone-to-modify-as-a-pin-or-make-it-skeleton-agnostic/2552528)
**Author:** [@BenVolo](https://forums.unrealengine.com/u/BenVolo)\ **Replies:** 0\ **Last updated:** [June 12, 2025, 7:29am UTC](https://forums.unrealengine.com/t/is-there-a-way-to-expose-this-bone-to-modify-as-a-pin-or-make-it-skeleton-agnostic/2552528 "2025-06-12T07:29:44Z")
I would also like to know if there is a way to make control rig skeleton agnostic as well. I know you can use On Initial Update to set the control rig class but from what i can tell there is no way to actually set the… --- ## [Packaging error, Object reference not set to an instance of an object?](https://forums.unrealengine.com/t/packaging-error-object-reference-not-set-to-an-instance-of-an-object/436834)
**Author:** [@BdeJong](https://forums.unrealengine.com/u/BdeJong)\ **Replies:** 4\ **Last updated:** [March 19, 2025, 9:28pm UTC](https://forums.unrealengine.com/t/packaging-error-object-reference-not-set-to-an-instance-of-an-object/436834 "2025-03-19T21:28:57Z")
My project refuses to package for Windows, I cant seem to find a previous topic on this particular problem occuring, so I’m hoping someone here might be able to shed some light on the cause. I’ve made the log file avail… --- ## [Is there any to restrict EditDefaultsOnly UProperty of an EditInLineNew UObject class only show on blueprint class default panel but not to show on c++ uproperty with Instanced Specifier](https://forums.unrealengine.com/t/is-there-any-to-restrict-editdefaultsonly-uproperty-of-an-editinlinenew-uobject-class-only-show-on-blueprint-class-default-panel-but-not-to-show-on-c-uproperty-with-instanced-specifier/1206383)
**Author:** [@tobia88](https://forums.unrealengine.com/u/tobia88)\ **Replies:** 1\ **Last updated:** [February 11, 2025, 4:34am UTC](https://forums.unrealengine.com/t/is-there-any-to-restrict-editdefaultsonly-uproperty-of-an-editinlinenew-uobject-class-only-show-on-blueprint-class-default-panel-but-not-to-show-on-c-uproperty-with-instanced-specifier/1206383 "2025-02-11T04:34:02Z")
Let say i’ve an class that inherited from UObject with EditInlineNew Specifier UCLASS( Abstract, Blueprintable, BlueprintType, EditInlineNew ) class S1\_API US1InventoryItemType : public UObject { GENERATED\_BODY() publ… --- ## [Pixel Streaming Instances](https://forums.unrealengine.com/t/pixel-streaming-instances/1989455)
**Author:** [@luhhiiz](https://forums.unrealengine.com/u/luhhiiz)\ **Replies:** 2\ **Last updated:** [November 18, 2024, 10:49am UTC](https://forums.unrealengine.com/t/pixel-streaming-instances/1989455 "2024-11-18T10:49:40Z")
Hello, I’m using pixel streaming in an arcvhiz project where I’m working on 5 to 20 instances, but even using a few, we feel a lot of input lag. Does anyone know of a way to optimize pixel streaming, or a configuration t… --- ## [Can't enable physics on instanced static mesh](https://forums.unrealengine.com/t/cant-enable-physics-on-instanced-static-mesh/304099)
**Author:** [@sandmeister](https://forums.unrealengine.com/u/sandmeister)\ **Replies:** 13\ **Last updated:** [June 27, 2024, 2:46pm UTC](https://forums.unrealengine.com/t/cant-enable-physics-on-instanced-static-mesh/304099 "2024-06-27T14:46:16Z")
Hello, I’m hoping I’m just missing something very simple here, but I can’t seem to solve this problem. If I make an empty blueprint actor, and then add an instanced static mesh component, no matter what I do “simulate … --- ## [{BUG?} HOW TO USE CAMERA ANIMATION INSTANCE?](https://forums.unrealengine.com/t/bug-how-to-use-camera-animation-instance/380363)
**Author:** [@Xanadron](https://forums.unrealengine.com/u/Xanadron)\ **Replies:** 6\ **Last updated:** [May 20, 2024, 9:28am UTC](https://forums.unrealengine.com/t/bug-how-to-use-camera-animation-instance/380363 "2024-05-20T09:28:35Z")
Hi, i didn’t find any documentation regarding the Camera Anim Inst and how to use it. What i am trying to do is to play a Camera Animation when the player is in idle and stop is when it is moving. I created a custom Came… --- ## [How to activate the "Create Dynamic Material" button in the details panel?](https://forums.unrealengine.com/t/how-to-activate-the-create-dynamic-material-button-in-the-details-panel/1819039)
**Author:** [@dudusstar](https://forums.unrealengine.com/u/dudusstar)\ **Replies:** 1\ **Last updated:** [April 26, 2024, 9:53am UTC](https://forums.unrealengine.com/t/how-to-activate-the-create-dynamic-material-button-in-the-details-panel/1819039 "2024-04-26T09:53:43Z")
Hi! Maybe this is a silly question but I’ve looking for a solution and there is so little information about it. I got a project in Unreal Engine 5.1 that has the “Create Dynamic Material” to set the instance parameters … --- ## [Is it possible to find the index of an instanced static mesh via its collider?](https://forums.unrealengine.com/t/is-it-possible-to-find-the-index-of-an-instanced-static-mesh-via-its-collider/291107)
**Author:** [@SFtheWolf](https://forums.unrealengine.com/u/SFtheWolf)\ **Replies:** 8\ **Last updated:** [March 27, 2024, 8:07am UTC](https://forums.unrealengine.com/t/is-it-possible-to-find-the-index-of-an-instanced-static-mesh-via-its-collider/291107 "2024-03-27T08:07:48Z")
Is there any way to access the instance index of an instanced static mesh by means of the mesh’s collider? Specifically, I need to know which instance is being overlapped by another physics object. --- ## [GetInstanceCount() returns 1 after removing an instance](https://forums.unrealengine.com/t/getinstancecount-returns-1-after-removing-an-instance/1725771)
**Author:** [@The\_untextured](https://forums.unrealengine.com/u/The_untextured)\ **Replies:** 0\ **Last updated:** [March 2, 2024, 9:40pm UTC](https://forums.unrealengine.com/t/getinstancecount-returns-1-after-removing-an-instance/1725771 "2024-03-02T21:40:08Z")
I am having a majour problem. I have a Hierarchical Instanced Static Mesh Component which can be modified during runtime and can be saved/loaded. When I remove an instance, if I save the game soon after, only the instan… --- ## [Instanced static mesh - sweep result hit item result returning "-1" in UE 5.3](https://forums.unrealengine.com/t/instanced-static-mesh-sweep-result-hit-item-result-returning-1-in-ue-5-3/1309203)
**Author:** [@SHOBBIT](https://forums.unrealengine.com/u/SHOBBIT)\ **Replies:** 2\ **Last updated:** [January 19, 2024, 6:44pm UTC](https://forums.unrealengine.com/t/instanced-static-mesh-sweep-result-hit-item-result-returning-1-in-ue-5-3/1309203 "2024-01-19T18:44:01Z")
Hello everyone I think I have encountered a bug in Unreal Engine 5.3 where the ISM Sweep Result Hit Item is returning “-1” instead of the instance index that it is expected to return (Cuz in previous engine versions it … --- ## [How to get instance bounds/size?](https://forums.unrealengine.com/t/how-to-get-instance-bounds-size/408168)
**Author:** [@Slavq](https://forums.unrealengine.com/u/Slavq)\ **Replies:** 7\ **Last updated:** [December 28, 2023, 6:21am UTC](https://forums.unrealengine.com/t/how-to-get-instance-bounds-size/408168 "2023-12-28T06:21:35Z")
Is it possible to get instanced mesh component instance bounds or size? The bound nodes seems to return bounds of whole component, not individual instance. I’ve also tried this custom expression: Primitive.LocalObjectB… --- ## [Packed Level Actor \[Unreal 5\] Decals Disappeared.](https://forums.unrealengine.com/t/packed-level-actor-unreal-5-decals-disappeared/778516)
**Author:** [@Jason.yikai](https://forums.unrealengine.com/u/Jason.yikai)\ **Replies:** 3\ **Last updated:** [December 13, 2023, 12:12pm UTC](https://forums.unrealengine.com/t/packed-level-actor-unreal-5-decals-disappeared/778516 "2023-12-13T12:12:10Z")
Hi, I’m trying the Packed Level Actor in Unreal 5, it works pretty well and very simple to use. However, I cannot figure out why all duplicated decal will disappear after I “Commit” the Packed Level Actor (Only 1 remain… --- ## [Get component by class, with components added to class inside an instance (UE5.1)](https://forums.unrealengine.com/t/get-component-by-class-with-components-added-to-class-inside-an-instance-ue5-1/1423562)
**Author:** [@gvnnp](https://forums.unrealengine.com/u/gvnnp)\ **Replies:** 0\ **Last updated:** [November 26, 2023, 7:04pm UTC](https://forums.unrealengine.com/t/get-component-by-class-with-components-added-to-class-inside-an-instance-ue5-1/1423562 "2023-11-26T19:04:47Z")
Hi, I have a project where inside the construction script, i use the node “get components by class (Box collision)”. The problem is that if i create an instance (object) of that class and i place it in the world, and th… --- ## [Foliage Error: Illegal property modification - FoliageInstancedStaticMeshComponent:OcclusionLayerNumNodes](https://forums.unrealengine.com/t/foliage-error-illegal-property-modification-foliageinstancedstaticmeshcomponent-occlusionlayernumnodes/1382724)
**Author:** [@PledgedRanger](https://forums.unrealengine.com/u/PledgedRanger)\ **Replies:** 1\ **Last updated:** [November 12, 2023, 1:52pm UTC](https://forums.unrealengine.com/t/foliage-error-illegal-property-modification-foliageinstancedstaticmeshcomponent-occlusionlayernumnodes/1382724 "2023-11-12T13:52:40Z")
When placing a foliage instance in the foliage tool, it works great! The problem is that when you paint the instance static meshes (Grass for example) I get a flood of errors in the Message Log. Therefore, I have inc… --- ## [Posses or spawn a level instance from Sequencer](https://forums.unrealengine.com/t/posses-or-spawn-a-level-instance-from-sequencer/1354612)
**Author:** [@SirBearington](https://forums.unrealengine.com/u/SirBearington)\ **Replies:** 0\ **Last updated:** [October 31, 2023, 6:26pm UTC](https://forums.unrealengine.com/t/posses-or-spawn-a-level-instance-from-sequencer/1354612 "2023-10-31T18:26:54Z")
Overriding the level parameter on the level instance actor through sequencer does not work. Likewise, I can’t spawn a level instance through sequencer. Is there a way to make this work? I’m working on a linear content p… --- ## [How to add 3rd party plugin?](https://forums.unrealengine.com/t/how-to-add-3rd-party-plugin/336571)
**Author:** [@SoraJr](https://forums.unrealengine.com/u/SoraJr)\ **Replies:** 6\ **Last updated:** [September 25, 2023, 8:29pm UTC](https://forums.unrealengine.com/t/how-to-add-3rd-party-plugin/336571 "2023-09-25T20:29:14Z")
I’m trying to add this plugin. It shows up in the eidtor but I can’t use it. Any idea why? Did I miss something? --- ## [Can I get the Instance Orientation in a material?](https://forums.unrealengine.com/t/can-i-get-the-instance-orientation-in-a-material/1310852)
**Author:** [@The\_untextured](https://forums.unrealengine.com/u/The_untextured)\ **Replies:** 1\ **Last updated:** [September 24, 2023, 10:52pm UTC](https://forums.unrealengine.com/t/can-i-get-the-instance-orientation-in-a-material/1310852 "2023-09-24T22:52:41Z")
Hi all! I have the following piece of material: In it, you can see the “ObjectOrientation” node. It makes the material work fine for normal static meshes, but when i use it on an instanced static mesh, it does not w… --- ## ['Update Instance Transform' / 'Remove Instance' == big performance hit even if used only on 1 instance](https://forums.unrealengine.com/t/update-instance-transform-remove-instance-big-performance-hit-even-if-used-only-on-1-instance/366116)
**Author:** [@Slavq](https://forums.unrealengine.com/u/Slavq)\ **Replies:** 13\ **Last updated:** [September 23, 2023, 4:36am UTC](https://forums.unrealengine.com/t/update-instance-transform-remove-instance-big-performance-hit-even-if-used-only-on-1-instance/366116 "2023-09-23T04:36:23Z")
Repro steps: Have a Landscape (or anything else) with large amount of grass/foliage painted (around 500k to test it) In blueprint, get any instance of the foliage mesh component and (using ‘Update Instance Transform’ w… --- ## [How to use two different Materials with Dynamic Material Instance](https://forums.unrealengine.com/t/how-to-use-two-different-materials-with-dynamic-material-instance/1253842)
**Author:** [@AsGard\_Gods\_Of\_Gaming](https://forums.unrealengine.com/u/AsGard_Gods_Of_Gaming)\ **Replies:** 1\ **Last updated:** [August 9, 2023, 1:04pm UTC](https://forums.unrealengine.com/t/how-to-use-two-different-materials-with-dynamic-material-instance/1253842 "2023-08-09T13:04:00Z")
I’m trying to create a character customization menu. Users can change char. skin color etc… My Skeletal Mesh for Males used Different Material from the Female Skeletal Mesh. I’m using G2:HumanBase from marketplace. The … --- ## [Saving packages stucked at 0% when saving material instance](https://forums.unrealengine.com/t/saving-packages-stucked-at-0-when-saving-material-instance/1220659)
**Author:** [@Pope\_Sweet\_Jezus](https://forums.unrealengine.com/u/Pope_Sweet_Jezus)\ **Replies:** 1\ **Last updated:** [July 7, 2023, 7:15pm UTC](https://forums.unrealengine.com/t/saving-packages-stucked-at-0-when-saving-material-instance/1220659 "2023-07-07T19:15:49Z")
I Have a problem with saving material instance in my project. It occurs only when saving material instance, for example it doesn’t happen when I’m saving level. It can save most of the values in material instance but not… --- ## [How i update a variable inside my widget blueprint from my blueprint actor and make it to work even if blueprint actor have more than one copy (instance) in the game?](https://forums.unrealengine.com/t/how-i-update-a-variable-inside-my-widget-blueprint-from-my-blueprint-actor-and-make-it-to-work-even-if-blueprint-actor-have-more-than-one-copy-instance-in-the-game/331527)
**Author:** [@buscas31](https://forums.unrealengine.com/u/buscas31)\ **Replies:** 17\ **Last updated:** [June 17, 2023, 8:51am UTC](https://forums.unrealengine.com/t/how-i-update-a-variable-inside-my-widget-blueprint-from-my-blueprint-actor-and-make-it-to-work-even-if-blueprint-actor-have-more-than-one-copy-instance-in-the-game/331527 "2023-06-17T08:51:08Z")
How i update a variable inside my widget blueprint from my blueprint actor and make it to work even if blueprint actor have more than one copy (instance) in the game? Soo…i have this blueprint actor called “door”. this … --- ## [How to set Default Values of Structures with Meshes/Objects?](https://forums.unrealengine.com/t/how-to-set-default-values-of-structures-with-meshes-objects/325709)
**Author:** [@Iohoilpotere](https://forums.unrealengine.com/u/Iohoilpotere)\ **Replies:** 4\ **Last updated:** [May 2, 2023, 7:42pm UTC](https://forums.unrealengine.com/t/how-to-set-default-values-of-structures-with-meshes-objects/325709 "2023-05-02T19:42:27Z")
Good evening everyone, I have a problem to set the default values in a structure that contains a mesh (or any variable whose value is unsettable by the menu structure). I created a structure that defines items in the ga… --- ## [Dynamic Material Opactiy Parameter not working (but only for certain colors)](https://forums.unrealengine.com/t/dynamic-material-opactiy-parameter-not-working-but-only-for-certain-colors/960473)
**Author:** [@Maderschaden](https://forums.unrealengine.com/u/Maderschaden)\ **Replies:** 0\ **Last updated:** [April 14, 2023, 4:13pm UTC](https://forums.unrealengine.com/t/dynamic-material-opactiy-parameter-not-working-but-only-for-certain-colors/960473 "2023-04-14T16:13:49Z")
Hi everyone, I have this very basic material setup with two parameters, color and opacity. Now if I set these parameters in a dynamic material, the opacity works, but only when the color “is actually a color” (w… --- ## [Repeat Q since 2015: How to change Variables of Child Actor Component, in a BP instance?](https://forums.unrealengine.com/t/repeat-q-since-2015-how-to-change-variables-of-child-actor-component-in-a-bp-instance/780887)
**Author:** [@XxNotAGamerxX](https://forums.unrealengine.com/u/XxNotAGamerxX)\ **Replies:** 4\ **Last updated:** [March 2, 2023, 1:19am UTC](https://forums.unrealengine.com/t/repeat-q-since-2015-how-to-change-variables-of-child-actor-component-in-a-bp-instance/780887 "2023-03-02T01:19:58Z")
Many have asked this for years. In UE4.27, how can we go to World/map view, click a Blueprint (Lootcrate BP), and edit the Variables (details panel) of a Child Actor Component (Pickup01 BP) that is inside the Blueprint… --- ## [Remove duplicate instance?](https://forums.unrealengine.com/t/remove-duplicate-instance/753235)
**Author:** [@Hellafaded4life](https://forums.unrealengine.com/u/Hellafaded4life)\ **Replies:** 5\ **Last updated:** [January 23, 2023, 11:25pm UTC](https://forums.unrealengine.com/t/remove-duplicate-instance/753235 "2023-01-23T23:25:06Z")
How can i remove the instance from a duplicated static mesh. Im trying to pincut a duplicated object without affecting its original owner. --- ## [Notes & Comments on Material Instances](https://forums.unrealengine.com/t/notes-comments-on-material-instances/729676)
**Author:** [@Virtuality](https://forums.unrealengine.com/u/Virtuality)\ **Replies:** 0\ **Last updated:** [December 16, 2022, 9:21am UTC](https://forums.unrealengine.com/t/notes-comments-on-material-instances/729676 "2022-12-16T09:21:27Z")
Using a master material with many instances, did anybody figure out a way to make notes / comments on a Material Instance? What I’m trying to achieve is adding a text field where I can summarize (scaling, source, etc) on… [Next page](https://forums.unrealengine.com/tag/instance/1171.md?match_all_tags=true&page=1&tags%5B%5D=instance)