
CHAPTER 7
Conclusions
On the surface, shadow determination appears to be a simple task to achieve. How-
ever, as evidenced by the enormous set of research literature today and the trend
that seems to continue, it is much more complex when the algorithms need to be
robust, of good quality, and of good performance. We also doubt if there will ever
be a single, feasible approach that unies and serves all shadow needs. We strongly
suspect that improvements will mostly come in the form of extensions to the three
major shadow approaches—shadow volumes, shadow depth maps, and ray tracing.
From an application standpoint, the choice of categorized approach