Efficient modeling of entangled details for natural scenes

Eric Guérin, Eric Galin, François Grosbellet, Adrien Peytavie, Jean-David Génevaux Computer Graphics Forum. Volume 35, number 7. Proceedings of Pacific Graphics 2016, Okinawa.

Digital landscape realism often comes from the multitude of details that are hard to model such as fallen leaves, rock piles or entangled fallen branches. In this article, we present a method for augmenting natural scenes with a huge amount of details such as grass tufts, stones, leaves or twigs. Our approach takes advantage of the observation that those details can be approximated by replications of a few similar objects and therefore relies on mass-instancing. We propose an original structure, the Ghost Tile, that stores a huge number of overlapping candidate objects in a tile, along with a pre-computed collision graph. Details are created by traversing the scene with the Ghost Tile and generating instances according to user-defined density fields that allow to sculpt layers and piles of entangled objects while providing control over their density and distribution.

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BibTeX

  @article {guerin2016b,
    author = {Guérin, Eric and Galin, Eric
              and Grosbellet, François
              and Peytavie, Adrien
              and Génevaux, Jean-David},
    title = {Efficient modeling of entangled details
             for natural scenes},
    journal = {Computer Graphics Forum
               (Proceedings of Pacific Graphics 2016)},
    volume = {35},
    number = {7},
    issn = {1467-8659},
    url = {http://dx.doi.org/10.1111/cgf.13023},
    doi = {10.1111/cgf.13023},
    pages = {257--267},
    year = {2016},
  }