SceneKit Model Wooden Material looks like Bronze in App

Question

Having problem with SceneKit object. Trying to get it to look like the first image below, but in the application it looks like plastic bronze.

Object in Xcode / SceneKit

Object in AR app

Can't really figure out what am doing wrong but have narrow it down to my material settings. Current settings:

Materials settings in Xcode

Answer 1

You're assigning specular map for diffuse, specular and metalness which is wrong.

PBR lights have four important components which are

Diffuse, Roughness, Metal and Normal

Assign these properties with the right map and you will have the expected result.

For More details on PBR check this link