I think we already addressed this problem through our support pipeline, but I just wanted to share the answer on Creative COW in the event anyone else has this issue as well.
The issue here is that your fine details along all the car seams are so small that they aren't represented well in the normal map. They are sharp edges that are smaller than their pixel representation in the normal map which means there just isn't enough data for Sapphire to work with.
So there's a few things that you can try to overcome this:
- Turn up highlight size. This will give Sapphire a larger tolerance at the edges for what should be bright
- Add some diffuse lighting. Right now you have this turned off, but even a small amount of diffuse lighting helps soften the sharp edges of the specular highlights
- Highlight brightness down
- Output your normal map at a higher resolution - say around 4k. This would get higher resolution data to Sapphire.
- Try applying Sapphire Blur->S_Median to the normals map to see if adding a filter to take the extremes helps.
If you try the median filter solution in addition to the diffuse lighting, I might do the diffuse lighting in one pass (without the median filter) and the specular highlighting in another pass with the median filter and add them back them together afterwards.
However, it's possible that even at high resolutions the creases are just too fine, in which case lighting it in Maya where there's no data loss is your best bet.
If you need any further clarification, please feel free to contact our support team.