How to pass *large* quantities of data to materials for shader computations?

Development Programming & Scripting
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6

Sounds like you’re almost there.
Now you just need create a material that has a “Texture Parameter” like this (taken out of some of my code for something else):

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and in your c++ code, create an instance of the material, and pass in the render target texture like:

UMaterial* material=LoadObject<UMaterial>(nullptr,TEXT("Material'/Game/M_MyMaterial.M_MyMaterial'"));
if(material) {
	matInstance=UMaterialInstanceDynamic::Create(material,nullptr);
	matInstance->SetTextureParameterValue(TEXT("Texture"),renderTarget); // sets the "Texture Paramter" to the rendertarget
	matInstance->SetScalarParameterValue(TEXT("Resolution"),res); // used to find texel size
}

There’s a “Resolution” paramter too to calculate the texel size.

You get best results if you set the interpolation type to 'Nearest Neighbor" too.