Parallel, Realistic and Controllable Terrain Synthesis

Gain, James; Merry, Bruce; Marais, Patrick

doi:10.1111/cgf.12545

Cited by 40 publications

(83 citation statements)

References 29 publications

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“…These enable users to apply local or global deformations to the terrain. For instance, sculpting can be done locally by interactively applying erosion tools [MDH07, ŠBBK08] or example‐based manipulators [GMM15]. It also enables editing at the scale of entire mountain ranges, by pushing tectonic plates against each other [CCB∗18] the earth crust is sculpted as if it was clay, with the guarantee that consistent mountain ranges (based on uplift and erosion) will be created.…”

Section: Discussionmentioning

confidence: 99%

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A Review of Digital Terrain Modeling

Galin

Guérin

Peytavie

et al. 2019

Computer Graphics Forum

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Terrains are a crucial component of three‐dimensional scenes and are present in many Computer Graphics applications. Terrain modeling methods focus on capturing landforms in all their intricate detail, including eroded valleys arising from the interplay of varied phenomena, dendritic mountain ranges, and complex river networks. Set against this visual complexity is the need for user control over terrain features, without which designers are unable to adequately express their artistic intent. This article provides an overview of current terrain modeling and authoring techniques, organized according to three categories: procedural modeling, physically‐based simulation of erosion and land formation processes, and example‐based methods driven by scanned terrain data. We compare and contrast these techniques according to several criteria, specifically: the variety of achievable landforms; realism from both a perceptual and geomorphological perspective; issues of scale in terms of terrain extent and sampling precision; the different interaction metaphors and attendant forms of user‐control, and computation and memory performance. We conclude with an in‐depth discussion of possible research directions and outstanding technical and scientific challenges.

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Section: Discussionmentioning

confidence: 99%

“…Gain et al . [GMM15] further address issues of efficiency and control by switching from patch‐based to parallel pixel‐based terrain synthesis. They adapt the stacked multiresolution pixel synthesis scheme of Lefebvre and Hoppe [LH05], which is well suited to implementation on graphics hardware.…”

Section: Example‐basedmentioning

confidence: 99%

A Review of Digital Terrain Modeling

Galin

Guérin

Peytavie

et al. 2019

Computer Graphics Forum

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“…Various methods use high-level interactive inputs to dene terrains. Silhouettes were used to dene roughness [Gain et al 2009[Gain et al , 2015 or to deform an existing terrain to create a view from a certain viewpoint [Tasse et al 2014]. Sketch-based approaches [Gain et al 2009;Hnaidi et al 2010;Tasse et al 2012] or direct interactive terrain editing [Peytavie et al 2009] were used to dene terrains with a high level of control, but can generate terrains that are not geologically correct.…”

Section: Related Workmentioning

confidence: 99%

Interactive example-based terrain authoring with conditional generative adversarial networks

et al. 2017

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Authoring virtual terrains presents a challenge and there is a strong need for authoring tools able to create realistic terrains with simple user-inputs and with high user control. We propose an example-based authoring pipeline that uses a set of terrain synthesizers dedicated to specic tasks. Each terrain synthesizer is a Conditional Generative Adversarial Network trained by using real-world terrains and their sketched counterparts. The training sets are built automatically with a view that the terrain synthesizers learn the generation from features that are easy to sketch. During the authoring process, the artist rst creates a rough sketch of the main terrain features, such as rivers, valleys and ridges, and the algorithm automatically synthesizes a terrain corresponding to the sketch using the learned features of the training samples. Moreover, an erosion synthesizer can also generate terrain evolution by erosion at a very low computational cost. Our framework allows for an easy terrain authoring and provides a high level of realism for a minimum sketch cost. We show various examples of terrain synthesis created by experienced as well as inexperienced users who are able to design a vast variety of complex terrains in a very short time.

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“…Many example-based methods are inspired by texture synthesis; for example the method of [16] exploits a user-painted coarse image to control the combination of patches extracted from real terrain data. Terrain samples can also be combined along user-drawn mountain ranges [17], or can be edited by resketching the silhouettes of mountains from a first person viewpoint [18]. Although these methods improve user control while maintaining small scale features from the original terrain data, they generally do not capture large scale landform features commonly observed in real landscapes and do not claim geological realism.…”

Section: User Gesturesmentioning

confidence: 99%

Sculpting Mountains: Interactive Terrain Modeling Based on Subsurface Geology

Cordonnier

Cani

Beneš

et al. 2018

IEEE Trans. Visual. Comput. Graphics

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Abstract-Most mountain ranges are formed by the compression and folding of colliding tectonic plates. Subduction of one plate causes large-scale asymmetry while their layered composition (or stratigraphy) explains the multi-scale folded strata observed on real terrains. We introduce a novel interactive modeling technique to generate visually plausible, large scale terrains that capture these phenomena. Our method draws on both geological knowledge for consistency and on sculpting systems for user interaction. The user is provided hands-on control on the shape and motion of tectonic plates, represented using a new geologically-inspired model for the Earth crust. The model captures their volume preserving and complex folding behaviors under collision, causing mountains to grow. It generates a volumetric uplift map representing the growth rate of subsurface layers. Erosion and uplift movement are jointly simulated to generate the terrain. The stratigraphy allows us to render folded strata on eroded cliffs. We validated the usability of our sculpting interface through a user study, and compare the visual consistency of the earth crust model with geological simulation results and real terrains.

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Parallel, Realistic and Controllable Terrain Synthesis

Cited by 40 publications

References 29 publications

A Review of Digital Terrain Modeling

A Review of Digital Terrain Modeling

Interactive example-based terrain authoring with conditional generative adversarial networks

Sculpting Mountains: Interactive Terrain Modeling Based on Subsurface Geology

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