substance procedural texture in Maya

Click BaseColor, Metallic, Roughness, Normal, displacement (Height)

- for all image map textures, change the color space to ‘raw’ - except for base color which will be srgb for display - and eventually aces color space for linear workflow
- on black and white ones, turn on "alpha is luminance”

When applying the normal map, click on the bump2D node that is created. 
Choose - Use as "tangent Space Normals"