Get dynamic material instance?

Development Rendering
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1

Hello

How can I get the dynamic material instance from my static mesh?

Here are some things I’ve tried:

// Returns UMaterialInstance, which wont let me edit scalar params
hand_hammer->GetMaterial(0); 

// Returns null
Cast<UMaterialInstanceDynamic>(hand_hammer->GetMaterial(0));

// Returns an empty material (the default grey)
UMaterialInstanceDynamic::Create(hand_hammer->GetMaterial(0), this);

All I want to do is modify the scalar params on the material instance that’s on the mesh.
Any help would be very appreciated.

Thanks!

2

When the mesh is first put into the world, you need to create a dynamic instance version of the material and assign back to the mesh material slot.

3

I’ve tried that in a number of ways (see my 3rd line of code) but creating an instance always seems to appear as an empty material. How would I properly go about doing this? Also do I need to store a reference to the dynamic instance? Or will I then be able to access it through GetMaterial(0) somehow?