How to override all materials in scene on BeginPlay?

[Stephane Roncada]

Never mind, got it working by getting AllComponentsOfClass instead

[Stephane Roncada]

So I want to do this little test, where I override all materials on all scene objects on BeginPlay, to test performance between using a really simple material vs expensive materials.

For Static Meshes, it's easy, but I'm having a hard time replacing materials on our custom Blueprint classes. I get all Child Actors in Blueprint, then cast to a StaticMeshActor, and get the StaticMesh, then replace all Materials on said StaticMesh with the cheap one, but it doesn't work.

Is there an easier way of doing this?

Thanks!