Has anyone ever seen this before? I am hoping that it is an issue with the model or Chitubox and not the printer itself. The ribbing seems to only start from the actual model and does not appear on the rafts or supports. I tried printing 10 different objects at once and only half of them were affected like this. i resliced and printed the same models a second time and got similar results. I am trying another print with a different model to see if it is persistent with different models. Models were provided in STL format pre-supported.ribbing[1].jpg