
My guess (but until we see the photos and zep that's all it is - a guess) is that you have bumps only where the porcelain is completely uniform. That is normal unfortunately due to the fact that completely plain surfaces are hard to process for photogrammetry in general, and you should consider eventually an advanced approach such as dirtying the surface or using projected patterns ( https://www.youtube.com/watch?v=E06k...ature=youtu.be , 4:20 mark )
Eventually, you can try using the SfS if you're using Zephyr Pro or Aerial since it's a very simple shape.
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