Measuring the surface texture of this O-ring presents a challenge. With a small radius and cross-section, steep sides, and soft material, it’s almost impossible to measure with a stylus. An optical instrument can do the job…but that’s just the first hurdle! In this Surface Notes blog post we show you how to use the Geometry Removal and Filtering tools in OmniSurf3D to measure this complex shape. You can try it for yourself as well—the dataset is available in our Surface Library!