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Thank you for that. I observed upon closer examination the 'stacking' of my points on a grid that looked like all Y data was at 10cm intervals. I now know how do deal with it and thank you for the clarification.

I open an e57 file (~250Mb), apply an affine transform, then save as an e57 file. The file size increases by ~50% and reports the same number of points when loaded but displays at a fraction of the point density (looks subsampled/decimated). Any ideas about what is happening? The affine transform 'g...