Figure 13 shows a comparative study between three possible lighting alternatives in a hotel lobby space. Several other designs were examined in this exploration of design visualization. With such a presentation, the final decision could be safely left to the client. One design application that requires very careful analysis is indirect lighting. Figure 14 shows a simulation of a new control center for the London Underground.
Stage lighting is another good application of physically-based rendering.
Figure 15 shows a simulation of a scene from the play Julius Caesar . Note the complex shadows cast by the many struts in the stage set. Computing these shadows with a radiosity algorithm would be extremely difficult. 4.2 Daylighting 5. Software Availability 8.