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In this paper we present an adaptive approach to volume rendering via 3D textures at arbitrary levels of detail. The algorithm has been designed to enable interactive exploration of large-scale data sets while providing user-adjustable resolution levels. A texture map hierarchy is constructed in a way that minimizes the amount of tex- ture memory with respect to the power-of-two restriction imposed by OpenGL implementations. In addition, our hierarchical level- of-detail representation guarantees consistent interpolation between different resolution levels. Special attention has been paid to the fix- ing of rendering artifacts that are introduced by non-corrected opac- ities at level transitions. By adapting the sample slice distance with regard to the desired level-of-detail, the number of texture lookups is reduced significantly .

Level-of-detail volume rendering via 3D textures