The Surface Colormap operator evaluates all pointcloud data that is within the Max distance of the CAD model. PC-DMIS does not use any data outside of the Max distance (default = 1 mm or 0.03937 inch) in the calculation. If the colormap is missing on portions of the CAD, you may need to increase the Max distance. This can be helpful, for example, on parts with larger deviations, or parts which are poorly aligned.
Use a Max distance value that is only large enough to capture the deviations. Setting the distance too large slows down the Colormap process as PC-DMIS searches that distance from all CAD surfaces.
Example of incomplete colormap on portions of CAD surfaces - Max distance = 1 mm
Example of completed colormap on CAD surfaces - Max distance = 2 mm
More: