| 2000 |  | some systems, and may have been source of other errors as well. | 
| 2001 |  |  | 
| 2002 |  | (Above changes included in 4.2.2 patch release.) | 
| 2003 | + |  | 
| 2004 | + | =================== | 
| 2005 | + | Version 5.0 | 
| 2006 | + |  | 
| 2007 | + | Improved ambient extrapolation to avoid zero values.  Actual | 
| 2008 | + | threshold set to 5% of recorded value. | 
| 2009 | + |  | 
| 2010 | + | Changed anisotropic Gaussian and Ashikhmin models so that | 
| 2011 | + | illegal orientation vectors are dealt with more gracefully. | 
| 2012 | + |  | 
| 2013 | + | Created wrapBSDF tool and incorporated into genBSDF along | 
| 2014 | + | with new rfluxmtx computation. | 
| 2015 | + |  | 
| 2016 | + | Initial check-in of Roland Schregle's photon map integration. | 
| 2017 | + | New 5.0a version designation as suggested by Andy McNeil. | 
| 2018 | + |  | 
| 2019 | + | Added left-hand coordinate sytems to rfluxmtx to correct | 
| 2020 | + | problems with coordinate axis orientations pointed out by | 
| 2021 | + | David Geisler-Moroder. |