“…Surface representation methods either explicitly represent the scene as point clouds [1,26,44,51,70,75], meshes [4,22,65], or implicitly using signed distance function [11,25,43,63,74]. Volumetric representations on the other hand typically use voxel grids [40,61], octrees [29,77], multi-plane [71,79], implicitly using a neural network [17,30,41] or a coordinate-based network as in NeRF [37] and its variants [3,35,38]. Recently, works such as Vol-SDF [73], NeuS [68] and UNISURF [42] propose to use volumetric rendering methods to extract a surface representation.…”