UE4 C++ - How to reference and load a Blendable object for camera post-process materials

At first, I thought this would be more complicated than I thought, but it didn’t take long before I got it working. I also wanted to write a tutorial on it, in case I’ve forgotten how to do it, or if someone was stuck and wanted to search for the answer on the internet. Well, I have the answer here my friend!

To have the Post Process Materials array have a defaulted element, follow the steps below, it’s quite easy.

This is how you would load a post process material in C++ from the default constructor:

static ConstructorHelpers::FObjectFinder<UMaterialInstanceConstant> M_FPCameraScreenEffect(TEXT("MaterialInstanceConstant'/Game/PostProcess/M_CRT_Post.M_CRT_Post'"));

To get this part in the TEXT() macro: MaterialInstanceConstant'/Game/PostProcess/M_CRT_Post.M_CRT_Post' , you would need to get the object reference from the content browser, like this:

Click Copy Reference on the material you want to reference (This will copy the path of the material to your clipboard)

And this is how you would add the loaded object to the list of blendables/post-process materials in the default constructor:

if (M_FPCameraScreenEffect.Object)
    FPCamera->AddOrUpdateBlendable(M_FPCameraScreenEffect.Object, 0.02f);

And there you have it, that’s it.

Hope I have helped you!