UV mapping is the 3D modelling process of projecting a 2D image to a 3D model's surface for texture mapping.The letters "U" and "V" denote the axes of the 2D texture because "X", "Y", and "Z" are already used to denote the axes of the 3D object in model space, while "W" (in addition to XYZ) is used in calculating quaternion rotations, a common operation in computer graphics
Apr 21, 2009 · Pepakura Designer - 3D model flattening tool by takesh h » Tue Apr 21, 2009 1:52 pm For those unfortunate ones without access to affordable 3D printer (does such a thing exist?), I strongly recommend testing Pepakura Designer, a shareware(US$38) that flattens 3D models exported from many 3D software.
3d flattening software
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If you want to just cut-off the Z-coordinates of a 3D polyline (make it appear 2D), use the FLATTEN command (Express Tools) to zero all Z-coordinates. The FLATSHOT command converts the whole view into a 2D drawing. You can EXPLODE the 3DPOLYLINE and then PEDIT>Join (PLJOIN) the resulting 2D lines (segments) back to a 2D polyline.
Hydro-flattening is the process of creating a Lidar-derived DEM in which water surfaces appear / behave as they would in traditional topographic DEMs created from photogrammetric digital terrain models (DTMs).