keywords: Substance Painter, Unreal Engine, Blender, UE4, Material, Steel Painted Scraped Dirty.

1, New a project in Blender, and press Shift + A to create a sample mesh.

2, Adjust Subdivision Surface for mesh.

Result:

3, Smooth the mesh.

Result:

4, Export the mesh as FBX file.

5, New a project in Substance Painter (Ctrl + N), and import the previous FBX file.

6, Bake mesh maps (F8):

Click Bake selected textures:
Then click Return to painting mode:

7, Select a smart material and drag it to the mesh.

Result:

8, You can adjust the smart material parameters if necessary:

9, Export textures

exported texture assets:

10, Import mesh into Unreal Engine.

11, Import textures into Unreal Engine. And uncheck rRGB on _OcclusionRoughnessMetallic texutre:

12, New a material in Unreal Editor.

drag these three textures into shader graph, and connect the pins as follows:
You will find that the _OcclusionRoughnessMetallic texture’s Sampler Type was set as Line Color automatically, since texture’s sRGB was unchecked.

If use sRGB for OcclusionRoughnessMetallic texture, some details such as worn edges will be lost.

13, Set the material slot on mesh.

Final result:

大上有立德，其次有立功，其次有立言，虽久不废，此之谓不朽。----《左传》