Real-time variable rigidity texture mapping

Abstract

Parameterisation of models is typically generated for a single pose, the rest pose. When a model deforms, its parameterisation characteristics change, leading to distortions in the appearance of texturemapped mesostructure. Such distortions are undesirable when the represented surface detail is heterogeneous in terms of elasticity (e.g. texture with skin and bone) as the material looks "rubbery". In this paper we introduce a technique that preserves the appearance of heterogeneous elasticity textures mapped on deforming surfaces by calculating dense, content-aware parameterisation warps in realtime. We demonstrate the usefulness of our method in a variety of scenarios: from application to production-quality assets, to realtime modelling previews and digital acting.

Content-aware texture deformation with dynamic control

“…Even if our isotropic control well preserves the area of the fruits, it changes their shape. Anisotropic control, in turn, strictly preserves the vertical sizes but internal micro-patterns are distorted compared to [20]. As expected, we cannot guaranty physical realism but only plausible deformations.…”

“…3. All examples derived from [20] (including Figure 15) exhibit rigid features on smooth stretchable backgrounds.…”

“…Figure 15 shows a comparison between our method and the physical simulation of Koniaris et al [20], which also deforms textures at fine resolution. Even if our isotropic control well preserves the area of the fruits, it changes their shape.…”

“…Our method has a constant cost per texel. Conversely, in [20], the cost depends on the resolution of the simulation grid, which may not coincide with the texture resolution. Therefore, it may hinder a correct management of very thin deforming structures at texel level.…”

“…4. Control in [20] is possible only through geometry deformation, contrarily to our approach, where texture deformation can be controlled locally, by any kind of parameters, as illustrated by Sections 5.2 and 5.3.…”