1. A method for displaying graphical data, the graphical data comprising at least one volume-data point within a data volume, the method comprising the steps of: creating a texture atlas, the texture atlas comprising a two-dimensional layout of at least one polygon in a polygonal surface; allocating a memory segment for the texture atlas and the data volume; scan-converting the at least one polygon to form a corresponding texel; writing the texel into the memory segment; and determining intersection of the texel and the polygonal surface.