# \#parameters **URL:** https://forums.unrealengine.com/tag/parameters/1309.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [Blueprint WeatherManager using MPCs and Structs ](https://forums.unrealengine.com/t/blueprint-weathermanager-using-mpcs-and-structs/2662669)
**Author:** [@Justaguy94](https://forums.unrealengine.com/u/Justaguy94)\ **Replies:** 0\ **Last updated:** [October 6, 2025, 1:09pm UTC](https://forums.unrealengine.com/t/blueprint-weathermanager-using-mpcs-and-structs/2662669 "2025-10-06T13:09:35Z")
im attempting to make a weathermanager using mpcs and structs, curious of any limitations to this process, as of now ive built my calendar and atmosphere modules. Currently working on hydrology and lighting modules. Ever… --- ## [Add A Shortcut For Converting A Constant To A Parameter (And Vice Versa) ](https://forums.unrealengine.com/t/add-a-shortcut-for-converting-a-constant-to-a-parameter-and-vice-versa/2612248)
**Author:** [@rosewood.mist](https://forums.unrealengine.com/u/rosewood.mist)\ **Replies:** 0\ **Last updated:** [July 20, 2025, 9:20pm UTC](https://forums.unrealengine.com/t/add-a-shortcut-for-converting-a-constant-to-a-parameter-and-vice-versa/2612248 "2025-07-20T21:20:30Z")
What it says on the tin. Having to right click and go into the context menu to convert a texture sample or constant to a parameter every single time gets annoying pretty quickly, a keyboard shortcut would avoid repetitiv… --- ## [Parameter not showing in instance](https://forums.unrealengine.com/t/parameter-not-showing-in-instance/421304)
**Author:** [@r\_lighter](https://forums.unrealengine.com/u/r_lighter)\ **Replies:** 13\ **Last updated:** [July 18, 2025, 6:28pm UTC](https://forums.unrealengine.com/t/parameter-not-showing-in-instance/421304 "2025-07-18T18:28:57Z")
Hi! I’ve been building a material for several hours and everything worked fine. At some point any new parameters that I created stopped showing in instances. I’ve tried renaming, creating different types of parameters, … --- ## [How to pass dynamic array parameters (Float or Vector) to materials?](https://forums.unrealengine.com/t/how-to-pass-dynamic-array-parameters-float-or-vector-to-materials/787052)
**Author:** [@Podort](https://forums.unrealengine.com/u/Podort)\ **Replies:** 8\ **Last updated:** [February 28, 2025, 4:47pm UTC](https://forums.unrealengine.com/t/how-to-pass-dynamic-array-parameters-float-or-vector-to-materials/787052 "2025-02-28T16:47:07Z")
Hello, I am trying to pass an array of 30 vectors updated each frame to my unreal materials to be used in a custom HLSL node. I would like to be able to access all these vectors in my material. I think a good similar e… --- ## [Using SetTimer() on a Function with Parameters](https://forums.unrealengine.com/t/using-settimer-on-a-function-with-parameters/305335)
**Author:** [@Janyx](https://forums.unrealengine.com/u/Janyx)\ **Replies:** 7\ **Last updated:** [February 7, 2025, 7:10pm UTC](https://forums.unrealengine.com/t/using-settimer-on-a-function-with-parameters/305335 "2025-02-07T19:10:26Z")
I am currently trying to implement a method that calls 2 functions. The catch is I don’t want the second one to run until the animation of the first has finished playing. I am trying to unequip a weapon then equip a ne… --- ## [Set timer by function name - pass parameter to function?](https://forums.unrealengine.com/t/set-timer-by-function-name-pass-parameter-to-function/366064)
**Author:** [@anonymous\_user\_6356da25](https://forums.unrealengine.com/u/anonymous_user_6356da25)\ **Replies:** 12\ **Last updated:** [March 22, 2024, 9:25pm UTC](https://forums.unrealengine.com/t/set-timer-by-function-name-pass-parameter-to-function/366064 "2024-03-22T21:25:24Z")
How do I pass parameters into the function called by Set timer by function name blueprint? If it’s not possible then is there an alternative way to to implement server task processing logic as below Receive player A re… --- ## [Modifying Blueprint Properties with Sequencer](https://forums.unrealengine.com/t/modifying-blueprint-properties-with-sequencer/460479)
**Author:** [@dogrush](https://forums.unrealengine.com/u/dogrush)\ **Replies:** 4\ **Last updated:** [February 13, 2024, 1:40pm UTC](https://forums.unrealengine.com/t/modifying-blueprint-properties-with-sequencer/460479 "2024-02-13T13:40:50Z")
Hi guys, as the documentation in Unreal only refers to the same question but for Matinee (which will be deleted very soon) I wanted to add the same tutorial related to Sequencer… it would be soooo nice to be able to comm… --- ## [Set Compression/Texture Settings from Blueprint not working](https://forums.unrealengine.com/t/set-compression-texture-settings-from-blueprint-not-working/426562)
**Author:** [@anonymous\_user\_3bc02732](https://forums.unrealengine.com/u/anonymous_user_3bc02732)\ **Replies:** 5\ **Last updated:** [January 17, 2024, 3:48pm UTC](https://forums.unrealengine.com/t/set-compression-texture-settings-from-blueprint-not-working/426562 "2024-01-17T15:48:14Z")
There are all the nodes, but nothing does anything. Screenshot from simple test project attached. It has a texture variable, which sets the texture parameter of a material istance. If I toogle from default compression to… --- ## [Controlling Dynamic Niagara Material Parameter With Blueprint](https://forums.unrealengine.com/t/controlling-dynamic-niagara-material-parameter-with-blueprint/450557)
**Author:** [@ReclusiveRychu](https://forums.unrealengine.com/u/ReclusiveRychu)\ **Replies:** 7\ **Last updated:** [October 12, 2023, 2:46am UTC](https://forums.unrealengine.com/t/controlling-dynamic-niagara-material-parameter-with-blueprint/450557 "2023-10-12T02:46:50Z")
Alright, Alright, Alright, So I’ve been testing out Niagara (nothing too complex), and I’ve created a beam particle system that I’m using as a laser. I’m using the Engine material “LaserPointerMaterial” and I’m attempti… --- ## [How do I add prefix to parameter names in material functions?](https://forums.unrealengine.com/t/how-do-i-add-prefix-to-parameter-names-in-material-functions/456037)
**Author:** [@Vini\_Cortez](https://forums.unrealengine.com/u/Vini_Cortez)\ **Replies:** 5\ **Last updated:** [September 29, 2023, 7:55pm UTC](https://forums.unrealengine.com/t/how-do-i-add-prefix-to-parameter-names-in-material-functions/456037 "2023-09-29T19:55:46Z")
The “Prefix Parameter Names” option is not adding the prefix, making other functions with the same parameter names to be unified, like a texture input is being the same to all the textures, because the parameter(variable… --- ## [Is there a way to control every Angular Motor individually from inside the blueprint?](https://forums.unrealengine.com/t/is-there-a-way-to-control-every-angular-motor-individually-from-inside-the-blueprint/358824)
**Author:** [@rocketman](https://forums.unrealengine.com/u/rocketman)\ **Replies:** 1\ **Last updated:** [September 20, 2023, 5:27pm UTC](https://forums.unrealengine.com/t/is-there-a-way-to-control-every-angular-motor-individually-from-inside-the-blueprint/358824 "2023-09-20T17:27:54Z")
Hi! I need a way to control the parameters of every Angular Motor in the skeletal mesh, but I need to be able to change the parameters of a single motor without overwriting the others. I can’t seem to find anything excep… --- ## [RVT Sample Parameter not working on Instances](https://forums.unrealengine.com/t/rvt-sample-parameter-not-working-on-instances/468965)
**Author:** [@Oluap\_Olinad](https://forums.unrealengine.com/u/Oluap_Olinad)\ **Replies:** 4\ **Last updated:** [August 1, 2023, 9:08am UTC](https://forums.unrealengine.com/t/rvt-sample-parameter-not-working-on-instances/468965 "2023-08-01T09:08:58Z")
When using RVT Sample Parameters node (mostly for blending), it works perfectly it we have it setup in the Main Material. But if we create a instance of that material, and change the RVT, it all turns to black. Example: … --- ## [\[Feedback / Feature Request\] Material Editor lacking basic parameters which can keep Material Instance Clean.](https://forums.unrealengine.com/t/feedback-feature-request-material-editor-lacking-basic-parameters-which-can-keep-material-instance-clean/1222450)
**Author:** [@Ibtesam\_Sadiq](https://forums.unrealengine.com/u/Ibtesam_Sadiq)\ **Replies:** 14\ **Last updated:** [July 8, 2023, 2:44pm UTC](https://forums.unrealengine.com/t/feedback-feature-request-material-editor-lacking-basic-parameters-which-can-keep-material-instance-clean/1222450 "2023-07-08T14:44:58Z")
Material Editor lacks some basic material parameters that can make the material instance way cleaner and more user-friendly. Needed Parameters: 1. Static Enum Parameter 2. Vector2 Parameter 3. Vector3 Parameter Note… --- ## [\[Feature Request\] Niagara: Default values for user exposed params in emitter, set those params through system](https://forums.unrealengine.com/t/feature-request-niagara-default-values-for-user-exposed-params-in-emitter-set-those-params-through-system/486141)
**Author:** [@Patrickode](https://forums.unrealengine.com/u/Patrickode)\ **Replies:** 4\ **Last updated:** [June 6, 2023, 2:41pm UTC](https://forums.unrealengine.com/t/feature-request-niagara-default-values-for-user-exposed-params-in-emitter-set-those-params-through-system/486141 "2023-06-06T14:41:36Z")
I have an emitter with a few parameters I want the user to be able to set; they’re currently emitter attributes that are set in Emitter Spawn. If I make them User Exposed parameters, however, not only can I not access th… --- ## [How to set initial color GPU particle parameter from blueprint?](https://forums.unrealengine.com/t/how-to-set-initial-color-gpu-particle-parameter-from-blueprint/295120)
**Author:** [@xdbxdbx](https://forums.unrealengine.com/u/xdbxdbx)\ **Replies:** 13\ **Last updated:** [May 17, 2023, 4:13pm UTC](https://forums.unrealengine.com/t/how-to-set-initial-color-gpu-particle-parameter-from-blueprint/295120 "2023-05-17T16:13:36Z")
My Setup at a glance: Not sure if this is a bug or not, but I cant set the initial color of the GPU particle from within a blueprint script. the colors change when i set the constant values in the components tab and… --- ## [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… --- ## [EQS Query Parameters](https://forums.unrealengine.com/t/eqs-query-parameters/344040)
**Author:** [@jtsmith](https://forums.unrealengine.com/u/jtsmith)\ **Replies:** 11\ **Last updated:** [February 28, 2023, 6:04pm UTC](https://forums.unrealengine.com/t/eqs-query-parameters/344040 "2023-02-28T18:04:48Z")
As you can see from the image below: An Environment Query can have properties in its Generator and Tests set as Parameters, much like how Materials can have Parameters. So, by entering the names of these Parameters and… --- ## [Using materials in control rig](https://forums.unrealengine.com/t/using-materials-in-control-rig/777697)
**Author:** [@Akrys91](https://forums.unrealengine.com/u/Akrys91)\ **Replies:** 5\ **Last updated:** [February 24, 2023, 11:27am UTC](https://forums.unrealengine.com/t/using-materials-in-control-rig/777697 "2023-02-24T11:27:29Z")
Hi Everyone, I’ve been looking at this post which goes into using materials in the control rig. Editing Materials with Control Rig | Tutorial This would be really helpful in a project I’m working on where I need to crea… --- ## [BP - Add Set Timer Delegate with a Parameter](https://forums.unrealengine.com/t/bp-add-set-timer-delegate-with-a-parameter/300493)
**Author:** [@tgraupmann](https://forums.unrealengine.com/u/tgraupmann)\ **Replies:** 3\ **Last updated:** [February 10, 2023, 4:21pm UTC](https://forums.unrealengine.com/t/bp-add-set-timer-delegate-with-a-parameter/300493 "2023-02-10T16:21:25Z")
I’m trying to use a timer, but I need to pass a sprite parameter since the class blueprint is used for several sprites. I need to make sure that the timer uses the correct sprite by passing as a parameter. Is there a wa… --- ## ["Parameter Material" module in cascade](https://forums.unrealengine.com/t/parameter-material-module-in-cascade/343363)
**Author:** [@anonymous\_user\_2e38d90e](https://forums.unrealengine.com/u/anonymous_user_2e38d90e)\ **Replies:** 5\ **Last updated:** [January 31, 2023, 5:09pm UTC](https://forums.unrealengine.com/t/parameter-material-module-in-cascade/343363 "2023-01-31T17:09:57Z")
I’m trying to change a material to another one used in cascade particle system via Particles Instance Parameters. One way I know to do this in UDK is using Material \> Parameter Material module, but I couldn’t find this … --- ## [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… --- ## [ClampMin and ClampMax meta for specific UFUNCTION arguments?](https://forums.unrealengine.com/t/clampmin-and-clampmax-meta-for-specific-ufunction-arguments/741146)
**Author:** [@BDC\_Patrick](https://forums.unrealengine.com/u/BDC_Patrick)\ **Replies:** 7\ **Last updated:** [January 4, 2023, 4:19pm UTC](https://forums.unrealengine.com/t/clampmin-and-clampmax-meta-for-specific-ufunction-arguments/741146 "2023-01-04T16:19:05Z")
hi there… I, f.e. got his function: UFUNCTION(BlueprintCallable, BlueprintPure=false, Category="Testing") void DoThings(int A, int B, int C, FVector3d& ReturnPoint); I now want to have B, and only B, being clamped bet… --- ## [How to update a post-process material parameter in BP?](https://forums.unrealengine.com/t/how-to-update-a-post-process-material-parameter-in-bp/449228)
**Author:** [@Heiko\_Schmitz](https://forums.unrealengine.com/u/Heiko_Schmitz)\ **Replies:** 3\ **Last updated:** [May 20, 2019, 10:08am UTC](https://forums.unrealengine.com/t/how-to-update-a-post-process-material-parameter-in-bp/449228 "2019-05-20T10:08:23Z")
Hi, I have an unbound post-process volume in my level that has a post-process material with 3 scalar parameters. I would like to change values of, for example, the “darken factor” parameter in character blueprint. How do… --- ## [Delegate with TMap working when it shouldn't](https://forums.unrealengine.com/t/delegate-with-tmap-working-when-it-shouldnt/393615)
**Author:** [@mjk0104](https://forums.unrealengine.com/u/mjk0104)\ **Replies:** 4\ **Last updated:** [August 30, 2022, 9:13am UTC](https://forums.unrealengine.com/t/delegate-with-tmap-working-when-it-shouldnt/393615 "2022-08-30T09:13:19Z")
I was having problems with declaring a delegate with a TMap as a parameter, kept getting that I had too many parameters in this declaration: DECLARE\_DELEGATE\_FiveParams(FOnAlarmJsonParsed, TArray\, TMap\ **Author:** [@anonymous\_user\_03a6467f](https://forums.unrealengine.com/u/anonymous_user_03a6467f)\ **Replies:** 11\ **Last updated:** [July 6, 2022, 1:55pm UTC](https://forums.unrealengine.com/t/can-texture-coordinate-parameters-be-applied-to-material-instances/278603 "2022-07-06T13:55:50Z") multiply your texture coordinate by a scalar parameter. then you can edit the scalar parameter in the MIC. --- ## [How to access a material instance variable from a blueprint object in Unreal Engine?](https://forums.unrealengine.com/t/how-to-access-a-material-instance-variable-from-a-blueprint-object-in-unreal-engine/475565)
**Author:** [@venomtail](https://forums.unrealengine.com/u/venomtail)\ **Replies:** 17\ **Last updated:** [May 18, 2022, 10:02am UTC](https://forums.unrealengine.com/t/how-to-access-a-material-instance-variable-from-a-blueprint-object-in-unreal-engine/475565 "2022-05-18T10:02:42Z")
I have a texture material that changes between 2 textures. This change can be controller by a variable. I’ve made a material instance from this material as well as a blueprint that has an object in it, to which this MI t… --- ## [Setting Health With Parameters](https://forums.unrealengine.com/t/setting-health-with-parameters/503598)
**Author:** [@Try\_Another](https://forums.unrealengine.com/u/Try_Another)\ **Replies:** 3\ **Last updated:** [March 3, 2022, 8:51am UTC](https://forums.unrealengine.com/t/setting-health-with-parameters/503598 "2022-03-03T08:51:44Z")
Ok, I just tried to do a healthbar based on this: Now the problem is how can I hook up health thins thing? I’m using health component so I tried this Tried several things too but It didn’t work --- ## [UMG - Widgets event as parameters?](https://forums.unrealengine.com/t/umg-widgets-event-as-parameters/495486)
**Author:** [@phil123456](https://forums.unrealengine.com/u/phil123456)\ **Replies:** 9\ **Last updated:** [February 9, 2022, 8:42pm UTC](https://forums.unrealengine.com/t/umg-widgets-event-as-parameters/495486 "2022-02-09T20:42:33Z")
Hi, I created a custom Button widget I use a caption variable that initializes it in editor question : I want to pass another variable containing a call back/custom event for an action that would be triggered … --- ## [Material instance parameters not working](https://forums.unrealengine.com/t/material-instance-parameters-not-working/494147)
**Author:** [@Cplazysloth](https://forums.unrealengine.com/u/Cplazysloth)\ **Replies:** 2\ **Last updated:** [February 4, 2022, 9:54am UTC](https://forums.unrealengine.com/t/material-instance-parameters-not-working/494147 "2022-02-04T09:54:45Z")
Greetings! I´ve been trying to make a material instance for my water for a project but somehow seems there are no parameters applied even if I already did it with all the nodes I want to be able to edit in the instance.… --- ## [Animating Material Layer Parameters w/ Sequencer](https://forums.unrealengine.com/t/animating-material-layer-parameters-w-sequencer/489672)
**Author:** [@reedandrader](https://forums.unrealengine.com/u/reedandrader)\ **Replies:** 0\ **Last updated:** [October 8, 2021, 3:12pm UTC](https://forums.unrealengine.com/t/animating-material-layer-parameters-w-sequencer/489672 "2021-10-08T15:12:54Z")
Hello all, I’m trying to animate the parameters of a material layer in sequencer the same way as one would with a traditional parameterized material. However, sequencer doesn’t seem to recognize parameters if they are d… [Next page](https://forums.unrealengine.com/tag/parameters/1309.md?match_all_tags=true&page=1&tags%5B%5D=parameters)