| 1862 |  | Added options to dctimestep to allow multiple time steps (-n) | 
| 1863 |  | and multiple output pictures or sensor files (-o).  Also added -i | 
| 1864 |  | option to specify float (-if) or double (-id) input for sky matrix. | 
| 1865 | + |  | 
| 1866 | + | Created gendaymtx program to compute annual sky patch matrix based | 
| 1867 | + | on Ian Ashdown's implementation of Perez all-weather sky model. | 
| 1868 | + | Output can be sent directly to dctimestep in ASCII or binary stream. | 
| 1869 | + |  | 
| 1870 | + | Replaced existing gendaylit.c with improved version from Wendelin Sprenger | 
| 1871 | + | and Jan Wienold of ISE. | 
| 1872 | + |  | 
| 1873 | + | Improved accuracy of ambient calculation for large -ad settings.  Thanks | 
| 1874 | + | to Lars Grobe for noticing the problem. | 
| 1875 | + |  | 
| 1876 | + | Added -r option to gendaymtx to rotate the sky the specified number of | 
| 1877 | + | degrees about the zenith as suggested by A. McNeil. | 
| 1878 | + |  | 
| 1879 | + | Axel Jacobs added -pal eco color map that does a blue-red-yellow scale. | 
| 1880 | + |  | 
| 1881 | + | Created bsdf2klems tool to convert from various BSDF representations to | 
| 1882 | + | Klems basis matrix in XML file. | 
| 1883 | + |  | 
| 1884 | + | Fixed problem with inappropriate reciprocity enforcement on tensor | 
| 1885 | + | tree reduction in genBSDF.  (Thanks to A.McNeil for discovering issue.) | 
| 1886 | + |  | 
| 1887 | + | Fixed bug in isotropic tensor tree sampling for impinging rays | 
| 1888 | + | exactly normal to surface.  Thanks to Peter Apian-Bennewitz for | 
| 1889 | + | discovering and pointing out the error. | 
| 1890 | + |  | 
| 1891 | + | Fixed double-counting bug in mirror material with alternate type. | 
| 1892 | + | Thanks to David Geisler-Moroder for spotting the problem and helping | 
| 1893 | + | to fix it. | 
| 1894 | + |  | 
| 1895 | + | Created rcollate program to resize and transpose matrix data for Andy | 
| 1896 | + | McNeil's 5-phase annual simulation method. | 
| 1897 | + |  | 
| 1898 | + | Added epw2wea conversion program by Christoph Reinhart. | 
| 1899 | + |  | 
| 1900 | + | Implemented Perlin's improved noise function with help from Rahul Narain. | 
| 1901 | + | This will change the appearance of renderings using this function. | 
| 1902 | + |  | 
| 1903 | + | Added "origin" command to rvu as requested by John Mardaljevic | 
| 1904 | + | to place view origin at selected point in scene. |