Monster Mash

A Single-View Approach to Casual 3D Modeling and Animation

Marek Dvorožňák
CTU in Prague, FEE
Daniel Sýkora
CTU in Prague, FEE
Cassidy Curtis
Google Research
Brian Curless
Google Research
Olga Sorkine-Hornung
ETH Zurich
David Salesin
Google Research


We present a new framework for sketch-based modeling and animation of 3D organic shapes that can work entirely in an intuitive 2D domain, enabling a playful, casual experience. Unlike previous sketch-based tools, our approach does not require a tedious part-based multi-view workflow with the explicit specification of an animation rig. Instead, we combine 3D inflation with a novel rigidity-preserving, layered deformation model, ARAP-L, to produce a smooth 3D mesh that is immediately ready for animation. Moreover, the resulting model can be animated from a single viewpoint — and without the need to handle unwanted inter-penetrations, as required by previous approaches. We demonstrate the benefit of our approach on a variety of examples produced by inexperienced users as well as professional animators. For less experienced users, our single-view approach offers a simpler modeling and animating experience than working in a 3D environment, while for professionals, it offers a quick and casual workspace for ideation.

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To appear in ACM Transactions on Graphics 39(6):214, 2020

(SIGGRAPH Asia 2020)

Supplementary Videos

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