This option enables clustering elements under user-defined part IDs according to a given grayscale image. Grayscale image files have to be provided in an ASCII-based *.pgm format. This can be exported from any image-processing software.

The grayscale values of each pixel in the image are assigned to a point cloud that is generated internally, and because of that, you must provide information about the image size for the point cloud to include the whole image. The point cloud starts generating at the bottom-left corner, which is given the global (0,0,0) coordinate. The generated point cloud functions as the source mesh, and there are cases where it might be necessary to assign simple transformations to the generated point cloud.