Hello everyone,
I’m new at the vfx World and while I was learning Niagara System I tried to create an attribute for each particle of my system and I know how to create the attribute , but i really don’t know how to set a value to the new attribure.
In my case, I would like to assign like a radius value to each particle but I don’t know if I have to create an script for set the value of the radius, or theres another way like a general attribute setter or somethink like that.
Thank you very much <3
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Welcome to vfx then 
If you haven’t checked it out yet, take a look at this thread, there’s some good tutorials linked there:
So, here are some images hopefully answering your question:
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Create new Particle Attribute
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Either in Particle Spawn or in Particle Update hit the ‘+’ to add a new module and go on ‘Set new or existing parameter directly’
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Select the module and set it to the value you like
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Win!
