Hardware-Based Volumetric Knit-Wear

Abstract

We present a hardware‐based, volumetric approach for rendering knit wear at very interactive rates. A single stitch is represented by a volumetric texture with each voxel storing the main direction of the strands of yarn inside it. We render the knit wear in layers using an approximation of the Banks model. Our hardware implementation allows specular and diffuse material properties to change from one voxel to the next. This enables us to represent yarn made up of different components or render garments with complicated color patterns. Furthermore, our approach can handle self‐shadowing of the stitches, and can easily be adapted to also include view‐independent scattering. The resulting shader lends itself naturally to mip‐mapping, and requires no reordering of the base geometry, making it versatile and easy to use. Categories and Subject Descriptors (according to ACM CCS): I.3.3 [Computer Graphics]: Hardware Applications Volumetric Textures

Efficient light scattering through thin semi-transparent objects

“…This alone indicates that few existing models deliberately deal with the visual effects addressed in this paper. Volume models, such as the one presented in [Messnier et al 2000], the one in [Daubert and Seidel 2002], or the lumislice model presented eg. in [Chen et al 2003], should be able to capture the effect of light transmitted through textile, but they are costly to evaluate.…”