In some embodiments, at a first step, at least one water-proof mesh 510 may be defined or calculated based on the input point cloud, and at a second step, the output points are sorted into at least two groups 301 and 302 (illustrated schematically, in a non-limiting manner, by different raster densities which are merely used to illustrate the different groupings, and not specifically different point densities or distributions). Point cloud 210 may be provided as input and a set of output points 300 may be defined, produced or provided, (illustrated schematically by a raster which is not limiting in the sense that the points may have any distribution and density, including variable distribution and/or varying density throughout the space). 1A shows a two-dimensional space, it will be understood that the present invention typically applies to three dimensions. 1A which illustrates input and output points and meshes according to some embodiments of the invention. Additionally, some of the described method embodiments or elements thereof can occur or be performed simultaneously, at the same point in time, or concurrently. Unless explicitly stated, the method embodiments described herein are not constrained to a particular order or sequence.

The term set when used herein may include one or more items. The terms “plurality” or “a plurality” may be used throughout the specification to describe two or more components, devices, elements, units, parameters, or the like. Although embodiments of the invention are not limited in this regard, the terms “plurality” and “a plurality” as used herein may include, for example, “multiple” or “two or more”. Although embodiments of the invention are not limited in this regard, discussions utilizing terms such as, for example, “processing,”“computing,”“calculating,”“determining,”“establishing”, “analyzing”, “checking”, or the like, may refer to operation(s) and/or process(es) of a computer, a computing platform, a computing system, or other electronic computing device, that manipulates and/or transforms data represented as physical (e.g., electronic) quantities within the computer's registers and/or memories into other data similarly represented as physical quantities within the computer's registers and/or memories or other information non-transitory storage medium that may store instructions to perform operations and/or processes.

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