It then becomes possible to establish energy exchanges at any level of this hierarchy, resulting in a truly progressive algorithm. The four rows of the following table show solutions obtained by selecting decreasing error tolerances. More accurate results can therefore be obtained at the expense of a longer computation time. The mesh used to capture the variations of illuminations is shown for each image. The images below show a graphical representation of the form factor matrices used to compute the four images above.
Color coding is used to indicate the magnitude of form factors.
The important thing to note is that matrices for the first images hav a very clear block structure.