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Change a material instance property of ALL objects using it during runtime

Hi,

I have a large area covered with trees using a procedural foliage spawner. I would like to simulate fall by changing a property in my leaves material instance (3 color parameter with an orange color that blends with the base texture).

When I open my material instance and change a parameter, every actor that uses this material changes realtime. Is there a way to do it like that but during runtime without having to go through all actors and change it one by one via a foreach loop?

Thanks!

Product Version: UE 4.21
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asked Mar 13 '19 at 10:26 PM in Blueprint Scripting

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Elggetto
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1 answer: sort voted first

yes, materials can be changed at runtime via either a dynamic material instance or a material parameter collection.

dynamic material instancing may work depending on how you're set up, but if you want the same value across all of the trees then a parameter collection may be easier to implement since it can be change from anywhere without needing to get references.

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answered Mar 14 '19 at 08:20 AM

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IndieGameCove
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avatar image Bariudol Mar 14 '19 at 10:49 AM

Just to complement your answer. Here is the documentation for Material Parameter Collections, which is what I think @Elggetto needs:
https://docs.unrealengine.com/en-us/Engine/Rendering/Materials/ParameterCollections

avatar image Elggetto Mar 14 '19 at 06:03 PM

Okay thanks it worked! I was able to seamlessly blend between different leaves via umg.

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