PBR Master is a universal material for Unreal Engine that simplifies the setup of PBR materials, using the textures you have available.
It provides a ready-made framework for creating complete, customizable materials without manually building a node network.
How to set up a custom material using PBR Master:
Go to PBR_Master > Materials, and pick one of the available material instances (MI_PBR_Opaque, MI_PBR_Masked or MI_PBR_Translucent) depending on whether you want to use opacity or not.
Copy the material instance you chose.
Under 01. Available Textures, check only the boxes that you have textures for.
When you want to use packed texture formats (ORM or RMA), note that there is a hierarchy of which textures are used: ORM > RMA > AmbientOcclusion/Roughness/Metallic.
When ORM is checked, the RMA or related single textures (AmbientOcclusion, Metallic, Roughness) are unavailable and hidden. To unhide them, deselect ORM.
When RMA is checked, it's related singe textures (Roughness, Metallic, AmbientOcclusion) are unavailable and hidden. To unhide them, deselect RMA.
Under 02. TextureSample Slots, fill in the slots accordingly.
Under 03. Edit UVs, adjust the texture scale, position (shift) and rotation.
Adjust the PBR parameters in category 04. to 11., until you have achieved your desired look.