Editing Parallel rendering (section)

=== Pixel distribution ===
Sets of pixels in the screen space can be distributed among processing units in what is often referred to as sort first rendering.<ref>Molnar, S., M. Cox, D. Ellsworth, and H. Fuchs. “[http://www.cs.unc.edu/~fuchs/publications/SortClassify_ParalRend94.pdf A Sorting Classification of Parallel Rendering].” IEEE Computer Graphics and Algorithms, pages 23-32, July 1994.</ref> 

Distributing interlaced lines of pixels gives good load balancing but makes data scaling impossible. Distributing contiguous 2D tiles of pixels allows for data scaling by culling data with the [[view frustum]]. However, there is a data overhead from objects on frustum boundaries being replicated and data has to be loaded dynamically as the view point changes. Dynamic load balancing is also needed to maintain performance scaling.