PerPixelOrt

PerPixelOrt is a rendering technique used in computer graphics to improve the accuracy of lighting calculations, particularly in situations involving indirect illumination. It aims to address some of the limitations of traditional methods by considering the orientation of surfaces at a finer granularity. Instead of assuming a single average normal for a pixel or a larger surface area, PerPixelOrt analyzes the orientation of smaller, hypothetical "orts" within that pixel or area.

This approach allows for more nuanced representation of how light bounces off surfaces with complex geometry or varying surface orientations. By subdividing the rendering area into these smaller orts, each with its own directional information, the system can more precisely calculate how light from different directions will interact with the surface. This can lead to more realistic reflections, softer shadows, and a generally improved perception of depth and detail in rendered scenes.

The computational cost of PerPixelOrt is higher than simpler rendering methods due to the increased calculations required for each ort. However, advancements in graphics hardware and efficient algorithms have made it a viable technique for achieving higher fidelity in real-time rendering applications, such as video games and interactive visualizations. Its implementation often involves sophisticated shaders and data structures to manage the orientation information for the individual orts.