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Circular Sight Glass 3D Model
Oryginaly made in FreeCAD, then exported as .STEP file to Autodesk 123D Design, After few corrections (text added) exported as .SAT to OnShape. From OnShape exported as .DAE file (Collada) and uploaded to SketchFab. In SketchFab final correction has been made (material, light, etc.).
I can’t find simple way to export smooth object from FreeCAD to SketchFab. If somebody find easier way to transfer smooth object with material information from FreeCAD to SketchFab, please let mi know.
If you want to see smoothnes difference look at https://skfb.ly/XzYL