  Despite the recent advances in graphics hardware capabilities, a brute force
approach is incapable of interactively displaying terabytes of data. We have
implemented a system that uses hierarchical level-of-detailing for the results
of cosmological simulations, in order to display visually accurate results
without loading in the full dataset (containing over 10 billion points). The
guiding principle of the program is that the user should not be able to
distinguish what they are seeing from a full rendering of the original data.
Furthermore, by using a tree-based system for levels of detail, the size of the
underlying data is limited only by the capacity of the IO system containing it.
