Measure the scan as geometry.

Let Tesselform read the part. Analyse divides the scan into regions and recognises each as a plane, cylinder, cone, sphere, blend or freeform area. Fit all then builds a surface for every region, exact shapes where the part has them and a fitted freeform surface only where it is genuinely freeform, trims each to its region, and joins them into one Design body.

• Mechanical holds sharp features; Organic lets them round. Detail, from 1 to 10, sets how small a feature it finds.
• Split a region by drawing across it, merge regions, or make a selection a region of its own.
• Regularise suggests the round values the features probably came from: a 9.97 mm hole is 10 mm.
• The part briefing lists every region and feature, with how much of the part each covers; one click selects every region of the same kind and size.

• You getOne trimmed Design body, ready to model on

Fit one shape to part of the scan and read what it measures: a plane's flatness, a cylinder's diameter and cylindricity, a sphere's diameter and sphericity, a cone's apex and angle. Click once on a bore and press Grow: the selection spreads right round the cylinder and stops where the part leaves that shape, even across a smooth fillet.

• Four ways to fit: least squares; minimum zone, the ISO form tolerance zone; largest inscribed, as a gauge pin sees a hole; and smallest circumscribed, as a ring gauge sees a shaft.
• Hold a diameter known from the drawing, so only the position and axis are fitted.
• Snap an axis square to the world and round sizes to a step; a snap that would spoil the fit by more than you allow is refused.
• Build shapes from others, such as a plane midway between two or a cylinder through two circles, or find the plane a part is most nearly symmetric about.

Select along a run of tube and Pipe fits one diameter along a centre line of straights and bends, read back as lines and arcs or as a spline, with the diameter, the length and every straight and bend reported. Set a known diameter, give it a bore, and smooth small wiggles out of the centre line.

Sheet fits one freeform surface to an area, with the control points you choose or as many as it takes to reach an accuracy. Loft fits spline profiles across the area and lofts a surface through them. Both can carry the surface past the selection, and have deviation, curvature and zebra checks to look at before you keep it.

Click near the edge of a hole: the edge round it is followed and a circle fitted, giving its diameter, centre and normal. Slots and rectangles are fitted to the selected rim or walls, giving their width, length, centre and turn. Choose Largest inscribed to measure a hole the way a gauge pin sees it.

Fit lines, points and axes to the scan, pick them, or build them from features you've already kept: a line where two planes meet, a point at a sphere's centre or a cone's apex, an axis along a cylinder, a point along a line at a set distance.

Make a coordinate system from three features: a plane or axis sets Z, a second feature sets X, and a third fixes the origin. Make it a datum, and measure true positions in it.

Cut through the scan with a plane set off a world plane, a fitted feature or a face you pick; tilt it and move it; then fit 2D lines, circles, arcs and slots by painting over the trace. Hide the scan in front of the section and turn to face it square on. A point cloud is gathered onto the section from a thickness you set.

Measure one feature's size and form, or the distance and angle between two. Make features datums A, B and C, and measure tolerances against them, each checked against its nominal with a green pass or a red fail.

• Flatness, straightness and circularity; diameters, radii, lengths and widths.
• Against datums: distance, angle, parallelism, perpendicularity, angularity, coaxiality, and true position in a Frame.
• Every result saved to a table with its characteristic, nominal and tolerance, and a note or balloon number.
• Export the report as a PDF, or as an .xlsx or CSV spreadsheet.

Send fitted features to the Design tab as construction geometry: planes become datum planes; lines, axes, cylinders and cones become datum axes; circles, slots and sections become sketch curves; and sheets and lofts become surface bodies.

Colour fitted surfaces by their distance from the scan, by how they bend, or with zebra stripes that show how smoothly they join. They are the same checks as on the Surface tab.