I used the same HDRI lighting in both programs. In Unity, the ORM map I used applies a uniform roughness to the entire model, as if it's not receiving specific information from the map about which areas should be rougher.
Firstly, thank you for your response As you can see, the Roughness details from Substance Painter are not being applied to the model in Unity. It either becomes overly shiny or the texture color becomes darker. The same issue occurs with the AO connection. I've tried two different ways of connecting the channels in RGBA.…
By the way, I'm not using any custom shaders. I haven't made any customizations on the Unity 3D Core (Built-in renderer) template. I simply placed the models in the scene and assigned materials. I also exported from Substance Painter using the metallicsmoothness presets and applied them to my other models using that…