o3de/Gems/Atom/Feature/Common/Registry/material_pipelines.setreg

{
    "O3DE": {
        "Atom": {
            "RPI": {
                "MaterialPipelineFiles": [
                    "@gemroot:Atom_Feature_Common@/Assets/Materials/Pipelines/MainPipeline/MainPipeline.materialpipeline",
                    "@gemroot:Atom_Feature_Common@/Assets/Materials/Pipelines/LowEndPipeline/LowEndPipeline.materialpipeline"
                ]
            }
        }
    }
}