Scale a niagara particle system

EnterMyDreams · August 29, 2023, 8:54am

did you ever get it? i’m struggling with it as well

EnterMyDreams · August 29, 2023, 5:22pm

THIS WORKED! Thank you!

For those wondering how to get this to work, use the > DannyMesiter < comment blueprint screenshot below.

As that one works. Drag that script module under > Initialize Particle for every particle system in your niagara.
Then you can scale using the local paramaters

Then works. thank you thank you thankyou!!!

TorQueMoD · September 1, 2023, 3:42am

Just click on the link and you’ll see the nodes you need to add.

Michael.Galetzka · September 1, 2023, 3:12pm

If you don’t want to roll your own module script, there is module called “Apply Owner Scale to Attributes” that comes with Niagara and allows you to select exactly which parts of your system you want to scale up.

Vekien · October 2, 2023, 12:12am

That just broke everything for me so I had to delete it, doesn’t seem to work at all. When I add it to any node it will just hide the effect.

Subressor · October 16, 2023, 9:13am

This is amazing! Really should be here by default when making a new blank emitter. Thanks!!

Mobiusone2029 · November 1, 2023, 10:47am

If anyone is in here in 2023 looking for an answer. Its very simple. In the emitter panel, click on shape location and you can adjust the scale based on the shape of your particles overall.

DANK_30 · November 17, 2023, 3:45am

Hey, could you please help me out. I got a torus shaped niagara particle system for a portal effect. I created the MS script file and also added it under initialize particle but still upon scaling the particles become so small that the particle system isnt visible at that point. What is missing over here?

TorQueMoD · January 12, 2024, 2:47am

Okay, for posterity I decided to both screen shot vivekananda_k’s node network for the script:

as well as post the actual code in text format as well so you can copy and paste it into UE:

Begin Object Class=/Script/NiagaraEditor.NiagaraNodeInput Name="NiagaraNodeInput_169"
   NodePosX=-592
   NodePosY=-80
   NodeGuid=2B45B5F243A8A69A63BBD0B999312CF7
   Input=(VarData=(0),Name="InputMap",TypeDefHandle=(RegisteredTypeIndex=52))
   CallSortPriority=1
   ChangeId=CC7AA51F43C7A96976FB79A1BB92C4AE
   CustomProperties Pin (PinId=34D05B1C45BB4050FF95298311BA0501,PinName="Input",Direction="EGPD_Output",PinType.PinCategory="Type",PinType.PinSubCategory="",PinType.PinSubCategoryObject=ScriptStruct'"/Script/Niagara.NiagaraParameterMap"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,LinkedTo=(NiagaraNodeParameterMapGet_6 C6443FCE4E3CD34338CBB3B470F90056,NiagaraNodeParameterMapSet_6 F3921B7A4404E1D75DA04A861CA45D7E),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False)
End Object
Begin Object Class=/Script/NiagaraEditor.NiagaraNodeParameterMapGet Name="NiagaraNodeParameterMapGet_6"
   NodePosX=-208
   NodePosY=240
   NodeGuid=B47EA575449F2A202ABE6A81F7C87E33
   PinOutputToPinDefaultPersistentId=((554306314C87B22F2E4CD38E64A4F590,E10A7A67479FA7F5B72B56BEB63FBB3D),(4F8DC486441E938DC30778AF33E5E32E,F0E52F2A4D9285D315DA7EB8953A2B75),(23473DCC4D001C2FF4CF56B92DDABF9E,CC4DBCEC4FD381E97474F6B745E465FA),(84A97C304ED63C6A26C0B78E89DDDCA2,C9A9DE5B468C54EE14A0FB937265C594),(FDB19D074AF7C2DCE401B5B0C8AD8E94,C8B5511A443D90499CC873AF9969051C),(78273A8944837A90B9E96E8175B197AF,B5A80D1840EEE862C9C17EAAEE5DE32B),(5736730C40AC1001843A5BB4E180EC4D,F9BC968E437794E025A5B681D2E6021A))
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   CustomProperties Pin (PinId=C6443FCE4E3CD34338CBB3B470F90056,PinName="Source",PinType.PinCategory="Type",PinType.PinSubCategory="",PinType.PinSubCategoryObject=ScriptStruct'"/Script/Niagara.NiagaraParameterMap"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,LinkedTo=(NiagaraNodeInput_169 34D05B1C45BB4050FF95298311BA0501),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False)
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End Object
Begin Object Class=/Script/NiagaraEditor.NiagaraNodeParameterMapSet Name="NiagaraNodeParameterMapSet_6"
   NodePosX=1392
   NodePosY=-96
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End Object
Begin Object Class=/Script/NiagaraEditor.NiagaraNodeConvert Name="NiagaraNodeConvert_0"
   NodePosX=192
   NodePosY=64
   NodeGuid=3723B019461B6CD1936847A2569ECA11
   AutowireBreakType=(ClassStructOrEnum=ScriptStruct'"/Script/CoreUObject.Vector"',UnderlyingType=2)
   Connections(0)=(SourcePinId=39EC09B544548E4289EAF2A399561815,SourcePath=("X"),DestinationPinId=756E736144636AFF6B445F9398F301B9,DestinationPath=("Value"))
   Connections(1)=(SourcePinId=39EC09B544548E4289EAF2A399561815,SourcePath=("Y"),DestinationPinId=22D74536407A9EB4239ECF9C6AF0F389,DestinationPath=("Value"))
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End Object
Begin Object Class=/Script/NiagaraEditor.NiagaraNodeConvert Name="NiagaraNodeConvert_9"
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End Object
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   CustomProperties Pin (PinId=C724F18F4E7B6A3A37F3D19527E449B2,PinName="B",PinToolTip="B",PinType.PinCategory="Type",PinType.PinSubCategory="",PinType.PinSubCategoryObject=ScriptStruct'"/Script/Niagara.NiagaraNumeric"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,DefaultValue="1.0",AutogeneratedDefaultValue="1.0",LinkedTo=(NiagaraNodeParameterMapGet_6 70CACD7C45EF066F508A598182B95B7C),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False)
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   CustomProperties Pin (PinId=528324FB43EF0E47181BD896DAE35F4A,PinName="Add",PinType.PinCategory="Misc",PinType.PinSubCategory="DynamicAddPin",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False)
End Object
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   NodePosX=1008
   NodePosY=352
   NodeGuid=081C450C4D4D0BADEA9CF0931F0766CA
   OpName="Numeric::Mul"
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End Object

Then just follow the steps I originally outlined:

For those who don’t know how to add a script to an emitter;

Inside your content browser, right-click and choose FX - Niagara Module Script. Name it EasyScale_MS. Open the file and select all the nodes and hit delete (Output will remain).
Visit that link vivekananda_k provided Niagara System scale modular script posted by anonymous | blueprintUE | PasteBin For Unreal Engine (if the web page says can’t be reached, just refresh) and select all the nodes and copy them. OR copy the text code I posted above. Then you can paste that into your EasyScale_MS Niagara Module Script.
Connect the Dest pin from the Map Set node into the Output Module then Apply and Save.
Open your Niagara system and you can drag your script from the content browser into your emitters. Make sure you place it directly below the Initialize Particle module.
Save your Niagara system and enjoy the ability to scale like normal particles.

There are of course limitations to this. If you scale the Niagara system up too much (like more than 10x) then it will of course require you to increase the values like the spawn rate etc. This is a work around, not a be-all and end-all solution.

f3llaN · February 7, 2024, 2:24pm

Thank you!

Module “Apply Owner Scale to Attributes” works great for me.

I first tried with the script “EasyScale_MS” described earlier in the thread and it was working for the most part. However, I was scaling the owner of the niagara system over time, and I had some particles that were only spawned as instantaneous spawns, not over time. These instantaneously spawned particles never scaled in size over time as the owner was scaled.

I think the script “EasyScale_MS” could be adjusted to work with my scenario, but since module “Apply Owner Scale to Attributes” worked so well I will stick with it.

Hovl_Studio · February 12, 2024, 1:34am

Any solution could work, but the best solution is to add a custom value for scaling and multiply it with any size, velocity or position value.

sergealmazov · March 22, 2024, 12:43pm

I’m not sure if my question is a relevant here, but I want to use Niagara scaling in MRQ while rendering with better / heavier values then in editor. Is that possible?