Overview
A new method of expressing three-dimensional light flow in architectural spaces is presented using the RADIANCE volume photon mapping extension. This light transport simulation algorithm is not bound to surfaces and can therefore visualise the volumetric light distribution taking into account luminance, direction, and colour.
Our method derives a physical light field from this distribution, providing a reference for a series of experiments to evaluate the corresponding visual light field using human observers. The goal of these experiments is to determine the accuracy with which the observers can predict the physical light field given visual cues such as shading, contrast, and reflected colour on guage objects within a real scene.
