# \#parameter **URL:** https://forums.unrealengine.com/tag/parameter/1295.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [How to animate material parameter in Sequencer?](https://forums.unrealengine.com/t/how-to-animate-material-parameter-in-sequencer/357149)
**Author:** [@anonymous\_user\_45c5466a](https://forums.unrealengine.com/u/anonymous_user_45c5466a)\ **Replies:** 23\ **Last updated:** [March 4, 2026, 4:27pm UTC](https://forums.unrealengine.com/t/how-to-animate-material-parameter-in-sequencer/357149 "2026-03-04T16:27:52Z")
How to animate materials with Sequencer? Matinee had an awesome feature of animating a float or vector material parameter. Sequencer is different and doesn’t have the same tracks available. Does anyone know how to ani… --- ## [No value will be returned by reference?](https://forums.unrealengine.com/t/no-value-will-be-returned-by-reference/327858)
**Author:** [@Cmoritz](https://forums.unrealengine.com/u/Cmoritz)\ **Replies:** 61\ **Last updated:** [December 24, 2025, 12:12am UTC](https://forums.unrealengine.com/t/no-value-will-be-returned-by-reference/327858 "2025-12-24T00:12:14Z")
I have an event node in my player class that executes on server and it takes an array parameter of a custom actor component class I created. When using the event node, there is a note on the bottom of it that states: No… --- ## [Is there a way to make a material's "Two Sided" checkbox a parameter?](https://forums.unrealengine.com/t/is-there-a-way-to-make-a-materials-two-sided-checkbox-a-parameter/394721)
**Author:** [@Flowerhat57](https://forums.unrealengine.com/u/Flowerhat57)\ **Replies:** 9\ **Last updated:** [April 22, 2025, 11:47am UTC](https://forums.unrealengine.com/t/is-there-a-way-to-make-a-materials-two-sided-checkbox-a-parameter/394721 "2025-04-22T11:47:49Z")
Hey all! Is there a way to expose the “two sided” checkbox of a material so it can be used by a blueprint and applied to a different material? Obviously what I have here isn’t going to work, but it’s along the lines of… --- ## [Error: C++ Default parameter not parsed: "nullptr"](https://forums.unrealengine.com/t/error-c-default-parameter-not-parsed-nullptr/385328)
**Author:** [@anonymous\_user\_1ed1c3df](https://forums.unrealengine.com/u/anonymous_user_1ed1c3df)\ **Replies:** 9\ **Last updated:** [December 21, 2024, 4:54pm UTC](https://forums.unrealengine.com/t/error-c-default-parameter-not-parsed-nullptr/385328 "2024-12-21T16:54:42Z")
I have a UFUNCTION that takes in a type of TScriptableInterface as one of its parameters. In the header, I have default values set for everything so when called in blueprint the function node has the defaults auto-filled… --- ## [Niagara Expose Parameter](https://forums.unrealengine.com/t/niagara-expose-parameter/461666)
**Author:** [@Jimonions](https://forums.unrealengine.com/u/Jimonions)\ **Replies:** 2\ **Last updated:** [August 14, 2024, 12:32am UTC](https://forums.unrealengine.com/t/niagara-expose-parameter/461666 "2024-08-14T00:32:44Z")
Pretty simple but unable to find an answer online, How do you make a parameter in Niagara that you can edit per asset in the world? I want to be able to drop a Niagara system in the world and then simply edit a value su… --- ## [What's the use of the "export" keyword ?](https://forums.unrealengine.com/t/whats-the-use-of-the-export-keyword/290263)
**Author:** [@GregBlast](https://forums.unrealengine.com/u/GregBlast)\ **Replies:** 6\ **Last updated:** [April 17, 2024, 2:53am UTC](https://forums.unrealengine.com/t/whats-the-use-of-the-export-keyword/290263 "2024-04-17T02:53:45Z")
Hello, I was having a look at some engine code and came accross that export keyword used as a parameter for UPROPERTY. As an example you can check the BoxExtent field from the UBoxComponent class (line 17). UPROPERTY(E… --- ## [How do I set per-instance material parameters on instanced static meshes?](https://forums.unrealengine.com/t/how-do-i-set-per-instance-material-parameters-on-instanced-static-meshes/281511)
**Author:** [@zgit\_1](https://forums.unrealengine.com/u/zgit_1)\ **Replies:** 4\ **Last updated:** [April 8, 2024, 1:52pm UTC](https://forums.unrealengine.com/t/how-do-i-set-per-instance-material-parameters-on-instanced-static-meshes/281511 "2024-04-08T13:52:07Z")
Let’s say I wanna color each instance of a sphere a different color. Is there a way to do that? Note: I need to use instanced static meshes, NOT a bunch of static meshes with unique material instances. I don’t see any n… --- ## [MaterialDynamicInstance not rendered with a different Color than orange..](https://forums.unrealengine.com/t/materialdynamicinstance-not-rendered-with-a-different-color-than-orange/1611938)
**Author:** [@BDC\_Patrick](https://forums.unrealengine.com/u/BDC_Patrick)\ **Replies:** 1\ **Last updated:** [January 16, 2024, 4:25pm UTC](https://forums.unrealengine.com/t/materialdynamicinstance-not-rendered-with-a-different-color-than-orange/1611938 "2024-01-16T16:25:08Z")
Hi there… Currently, I’m trying to create a Hold Indicator Material (like a Cooldown overlay, just for the Hold Action of an Input). This is my Slot Widget, I want the Material to be added to: This is the Graph … --- ## [Animnotify Parameters](https://forums.unrealengine.com/t/animnotify-parameters/359338)
**Author:** [@Gfelb](https://forums.unrealengine.com/u/Gfelb)\ **Replies:** 6\ **Last updated:** [January 22, 2023, 6:47pm UTC](https://forums.unrealengine.com/t/animnotify-parameters/359338 "2023-01-22T18:47:51Z")
Is it possible to pass a parameter with a custom animnotify? A simple example of this would be: I have an animmontage that has a chain of attacks I have an anim notify trigger every time I want to try and deal damage I… --- ## [How to change parameters in layer material with blueprint](https://forums.unrealengine.com/t/how-to-change-parameters-in-layer-material-with-blueprint/474546)
**Author:** [@Alsoexist](https://forums.unrealengine.com/u/Alsoexist)\ **Replies:** 1\ **Last updated:** [May 31, 2022, 11:23am UTC](https://forums.unrealengine.com/t/how-to-change-parameters-in-layer-material-with-blueprint/474546 "2022-05-31T11:23:27Z")
I created layer material and I want to change the parameters of each layer in blueprint.I use the set vector/scalar parameter value node . But it only can change the parameters in the master mateial by input the paramet… --- ## [How to have string parameter in material editorl](https://forums.unrealengine.com/t/how-to-have-string-parameter-in-material-editorl/487178)
**Author:** [@BatYaggy](https://forums.unrealengine.com/u/BatYaggy)\ **Replies:** 4\ **Last updated:** [August 8, 2021, 3:00pm UTC](https://forums.unrealengine.com/t/how-to-have-string-parameter-in-material-editorl/487178 "2021-08-08T15:00:04Z")
I need to access a string from the material editor. Is this possible? --- ## [Can we compile/create material instances with scripts?](https://forums.unrealengine.com/t/can-we-compile-create-material-instances-with-scripts/486011)
**Author:** [@somawheels](https://forums.unrealengine.com/u/somawheels)\ **Replies:** 2\ **Last updated:** [July 10, 2021, 7:35pm UTC](https://forums.unrealengine.com/t/can-we-compile-create-material-instances-with-scripts/486011 "2021-07-10T19:35:13Z")
I have a master material, with a bunch of static switch bool parameters. I need to figure out how to create a new material instance asset for each possible combination of static switch parameters. The reason i need to d… --- ## [save value in material?](https://forums.unrealengine.com/t/save-value-in-material/480074)
**Author:** [@anonymous\_user\_cadb2c191](https://forums.unrealengine.com/u/anonymous_user_cadb2c191)\ **Replies:** 2\ **Last updated:** [March 11, 2021, 5:31pm UTC](https://forums.unrealengine.com/t/save-value-in-material/480074 "2021-03-11T17:31:36Z")
I’m not realy sure if this is even possible. But i want to use a material to offset a bone in my skeletal mesh. It’s like the opposite of parameters that you can create in a material. With these you can input a value fr… --- ## [Ctrl + Alt not bringing up full parameter description](https://forums.unrealengine.com/t/ctrl-alt-not-bringing-up-full-parameter-description/479363)
**Author:** [@SpectrumAerial](https://forums.unrealengine.com/u/SpectrumAerial)\ **Replies:** 2\ **Last updated:** [February 25, 2021, 1:11am UTC](https://forums.unrealengine.com/t/ctrl-alt-not-bringing-up-full-parameter-description/479363 "2021-02-25T01:11:41Z")
In following the Unreal Editor Fundamentals - Materials tutorial, holding the Ctrl + Alt keys should be displaying a full description of the parameters details in the Material editor; this is not working for my installat… --- ## [How to blend between sets of parameters](https://forums.unrealengine.com/t/how-to-blend-between-sets-of-parameters/475589)
**Author:** [@effector117](https://forums.unrealengine.com/u/effector117)\ **Replies:** 5\ **Last updated:** [December 9, 2020, 8:58am UTC](https://forums.unrealengine.com/t/how-to-blend-between-sets-of-parameters/475589 "2020-12-09T08:58:29Z")
Here’s what I’m facing: I have about 10 different parameters in my material, and I can achieve multiple different looks by changing those parameters in relation to one another. Let’s say I have two different looks to my… --- ## [Particle parameter bug](https://forums.unrealengine.com/t/particle-parameter-bug/475039)
**Author:** [@KhenaB](https://forums.unrealengine.com/u/KhenaB)\ **Replies:** 3\ **Last updated:** [December 8, 2020, 12:07am UTC](https://forums.unrealengine.com/t/particle-parameter-bug/475039 "2020-12-08T00:07:32Z")
Unable to submit a bug report using the form, tried on two browsers so submitting here. When both a Color and Vector instance parameters are present, changing the Color parameter resets the Vector back to 0,0,0 --- ## [Niagara Module Script - How to create a user Parameter in 4.25](https://forums.unrealengine.com/t/niagara-module-script-how-to-create-a-user-parameter-in-4-25/469992)
**Author:** [@anonymous\_user\_8ae5a3a7](https://forums.unrealengine.com/u/anonymous_user_8ae5a3a7)\ **Replies:** 0\ **Last updated:** [August 19, 2020, 8:58am UTC](https://forums.unrealengine.com/t/niagara-module-script-how-to-create-a-user-parameter-in-4-25/469992 "2020-08-19T08:58:51Z")
Since the release of 4.25, you can’t create a user parameter in the Module Script of Niagara anymore. All the options you get from Map Get are all different from the last version. Since I can’t cerate a new User Paramete… --- ## [ColorOverLife to use LinearColorCurve as input](https://forums.unrealengine.com/t/coloroverlife-to-use-linearcolorcurve-as-input/389258)
**Author:** [@Shempii](https://forums.unrealengine.com/u/Shempii)\ **Replies:** 1\ **Last updated:** [November 5, 2019, 11:57pm UTC](https://forums.unrealengine.com/t/coloroverlife-to-use-linearcolorcurve-as-input/389258 "2019-11-05T23:57:00Z")
Goal: Parameterize an emitter’s ColorOverLife so that I can have a single particle system that can be used on any number of teams (Red, Blue, etc.). Reason: This way, all I need to do is assign a color “palette” for eac… --- ## [UDelegateFunction as parameter](https://forums.unrealengine.com/t/udelegatefunction-as-parameter/390921)
**Author:** [@Arkh4in](https://forums.unrealengine.com/u/Arkh4in)\ **Replies:** 2\ **Last updated:** [June 17, 2019, 5:17pm UTC](https://forums.unrealengine.com/t/udelegatefunction-as-parameter/390921 "2019-06-17T17:17:57Z")
Hi guys, I’m currently implementing an event manager (which is not in the scene, it’s pure c++) that must call blueprints events / functions. What seemed the most easy to use was a function pointer on a function created… --- ## [Sequencer Event Parameter Struct is null after triggering event once](https://forums.unrealengine.com/t/sequencer-event-parameter-struct-is-null-after-triggering-event-once/393030)
**Author:** [@anonymous\_user\_52c45f28](https://forums.unrealengine.com/u/anonymous_user_52c45f28)\ **Replies:** 6\ **Last updated:** [February 12, 2019, 12:55pm UTC](https://forums.unrealengine.com/t/sequencer-event-parameter-struct-is-null-after-triggering-event-once/393030 "2019-02-12T12:55:17Z")
Hey, while working with the sequencer I encountered the following bug: I created an event track and set some keys which trigger a custom event in my Persistent Level BP. To pass values to the custom event I created a s… --- ## [Particle parameter not working for 'Initial Size'](https://forums.unrealengine.com/t/particle-parameter-not-working-for-initial-size/354622)
**Author:** [@Slavq](https://forums.unrealengine.com/u/Slavq)\ **Replies:** 4\ **Last updated:** [January 29, 2019, 6:17pm UTC](https://forums.unrealengine.com/t/particle-parameter-not-working-for-initial-size/354622 "2019-01-29T18:17:07Z")
In both CPU and GPU emitters, I have a setup exactly like this one, except I do this in Construction Script: … And it doesn’t work. No matter what value I set as parameter from blueprint, it doesn’t change. --- ## [Distribution Float Particle Parameter Trigger](https://forums.unrealengine.com/t/distribution-float-particle-parameter-trigger/439328)
**Author:** [@cganim8r](https://forums.unrealengine.com/u/cganim8r)\ **Replies:** 0\ **Last updated:** [December 12, 2018, 1:09am UTC](https://forums.unrealengine.com/t/distribution-float-particle-parameter-trigger/439328 "2018-12-12T01:09:12Z")
Hi people, I’m trying to trigger a particle spawn count only when I press (and release) a button. I hope it’ll make sense when you watch the short screen-capture. My problem is that if I set the spawn Constant to zero, … --- ## [Changes in the material instance editor won't show up in the level editor](https://forums.unrealengine.com/t/changes-in-the-material-instance-editor-wont-show-up-in-the-level-editor/430554)
**Author:** [@YamiBH](https://forums.unrealengine.com/u/YamiBH)\ **Replies:** 1\ **Last updated:** [July 30, 2018, 9:32am UTC](https://forums.unrealengine.com/t/changes-in-the-material-instance-editor-wont-show-up-in-the-level-editor/430554 "2018-07-30T09:32:22Z")
Are you sure that you are using Landscape\_Material\_Inst on landscape? It looks like to me that you are still using Landscape\_Material… --- ## [Material Instances Losing Parameter Values](https://forums.unrealengine.com/t/material-instances-losing-parameter-values/393341)
**Author:** [@UKG\_M](https://forums.unrealengine.com/u/UKG_M)\ **Replies:** 4\ **Last updated:** [April 4, 2018, 5:47am UTC](https://forums.unrealengine.com/t/material-instances-losing-parameter-values/393341 "2018-04-04T05:47:07Z")
Right, so I made a master material with a TextureSampleParameter2D node so I can change the texture as I have a lot of similar materials in the scene. The problem is the material instances are going back to the parent te… --- ## [Plugin : How to properly include a struct](https://forums.unrealengine.com/t/plugin-how-to-properly-include-a-struct/409733)
**Author:** [@anonymous\_user\_a95c0d08](https://forums.unrealengine.com/u/anonymous_user_a95c0d08)\ **Replies:** 5\ **Last updated:** [November 15, 2017, 11:00pm UTC](https://forums.unrealengine.com/t/plugin-how-to-properly-include-a-struct/409733 "2017-11-15T23:00:15Z")
I have the same problem - unfortunately you will have to move your struct to the tracer.h otherwise it will not work :frowning: --- ## [BUG: Tether Parameters of Clothing useless](https://forums.unrealengine.com/t/bug-tether-parameters-of-clothing-useless/404165)
**Author:** [@RRe36](https://forums.unrealengine.com/u/RRe36)\ **Replies:** 4\ **Last updated:** [October 5, 2017, 3:52pm UTC](https://forums.unrealengine.com/t/bug-tether-parameters-of-clothing-useless/404165 "2017-10-05T15:52:43Z")
Hello there, I’ve just noticed that the Tether Parameters (Tether Limit and Tether Stiffness) seem to be useless because it seems like they are not affecting the Clothing behavior at all. I would suppose that this is a … --- ## [Highlight Glow Material](https://forums.unrealengine.com/t/highlight-glow-material/354411)
**Author:** [@anonymous\_user\_383b03ea](https://forums.unrealengine.com/u/anonymous_user_383b03ea)\ **Replies:** 6\ **Last updated:** [September 17, 2017, 1:43am UTC](https://forums.unrealengine.com/t/highlight-glow-material/354411 "2017-09-17T01:43:36Z")
How can I make a silhouette outline for actors? I want to make it so that some objects highlight when the mouse hovers on them. My goal is to have a material that can have the strength of the outline toggled with a param… --- ## [Unexpected behavior: Sin(time) seems to be "invisibly" remapped](https://forums.unrealengine.com/t/unexpected-behavior-sin-time-seems-to-be-invisibly-remapped/404338)
**Author:** [@BrendanLoBuglio](https://forums.unrealengine.com/u/BrendanLoBuglio)\ **Replies:** 2\ **Last updated:** [September 15, 2017, 10:58pm UTC](https://forums.unrealengine.com/t/unexpected-behavior-sin-time-seems-to-be-invisibly-remapped/404338 "2017-09-15T22:58:35Z")
Hi, there! This is a quick, and maybe pedantic question about the Sin and Time nodes in Unreal, but I’m experiencing some odd behavior that I’d like to better understand. In this screen recording, I have a simple materi… --- ## [Using a string in unreal](https://forums.unrealengine.com/t/using-a-string-in-unreal/398316)
**Author:** [@anonymous\_user\_90f5c413](https://forums.unrealengine.com/u/anonymous_user_90f5c413)\ **Replies:** 1\ **Last updated:** [August 5, 2017, 9:49pm UTC](https://forums.unrealengine.com/t/using-a-string-in-unreal/398316 "2017-08-05T21:49:47Z")
I am trying to add something so that the player can name themselves and a few other things whatever they like. However, Visual Studio is not recognizing the type string, even after I have added #include . I also cannot u… --- ## [Material Texture/Vector Param when renaming..](https://forums.unrealengine.com/t/material-texture-vector-param-when-renaming/400891)
**Author:** [@anonymous\_user\_5f225f0d](https://forums.unrealengine.com/u/anonymous_user_5f225f0d)\ **Replies:** 0\ **Last updated:** [July 30, 2017, 4:07pm UTC](https://forums.unrealengine.com/t/material-texture-vector-param-when-renaming/400891 "2017-07-30T16:07:46Z")
…Material Constant loses Value. In 4.10 it was working, what i double checked. Please recover the posibility to rename Parameters so that the “Material Constant” Don’t lose their set Values in Texture Param or Vector Par… [Next page](https://forums.unrealengine.com/tag/parameter/1295.md?match_all_tags=true&page=1&tags%5B%5D=parameter)