USING INDIRECTION MAPS FOR RENDERING TEXTURE SPACE EFFECTS

摘要

Embodiments of the present invention are directed to a novel approach for realistically modeling sub-surface scattering effects in three-dimensional objects of graphically rendered images. In an embodiment, an indirection map is generated for an image by analyzing the triangle mesh of one or more three-dimensional objects in the image and identifying pairs of edges between adjacent triangles in the mesh that have the same spatial locations in the three-dimensional representations, but which have different locations in the texture map. For each of these edges, the opposite triangle in each pair is projected into their corresponding edge's two-dimensional space. This allows samples which cross a seam in the two dimensional representation that would otherwise sample out into invalid data to be redirected to the spatially correct region of the texture and generate consistent results with non-seam areas.

主权项

1. A system for performing visual effects for a texture map, the system comprising:
a three-dimensional model in a three-dimensional image space, the three-dimensional model comprising a plurality of delineations between a first region and a second region, a two-dimensional representation corresponding to the three-dimensional model, the two-dimensional representation comprising a mapping of a plurality of texture values from a texture map in a two-dimensional image space comprising a plurality of positions; and an indirection map corresponding to the texture map, the indirection map comprising a mapping of a plurality of addresses in the texture map to the plurality of positions in the two-dimensional image space, wherein each address of the plurality of addresses in the texture map corresponding to a position in the second region is mapped to a position in the first region in the indirection map.