--- ray/doc/notes/ReleaseNotes	2024/05/17 20:50:57	1.450
+++ ray/doc/notes/ReleaseNotes	2025/01/23 22:03:59	1.475
@@ -2695,3 +2695,79 @@ Added -i option to gendaymtx to match -i option of gen
 Thanks to Yongqing for initial implementation.
 
 Changed rcrop so negative #rows or #cols counts back from end.
+
+Added rcomb -n option for multi-processing of very large matrices.
+
+Made it so rsplit and rlam can handle any number of input files
+up to active open file descriptor limit.
+
+Taoning Wang added genssky tool for generating spectral sky
+descriptions.
+
+Taoning added gensdaymtx utility based on gendaymtx, and
+added epw2wea -a option to include required information.
+
+Fixed bug introduced in Auguest 2022 (5.4 release) in distant
+light source sampling, which caused aiming failures.  (Thanks
+to Mike DiPompeo of LightStanza for reporting the issue.)
+
+Added rxpict rendering tool based on C++ RpictSimulManager class.
+Multi-processing and spectral output are supported.
+
+Wrote rxpiece tool that will render pictures using tiling and
+can handle different output formats and hyperspectral pictures.
+Only runs on a single machine, however -- now NFS locking on
+shared volumes.  Mainly a demonstration tool for RpictSimulManager
+C++ class, but may have its uses.
+
+Fixed a bug in BSDF sampling of sources pointed out by
+David Geisler-Moroder, which tended to overestimate specular
+contributions for some BSDFs.
+
+Added crude ability to read and convert spectra to RGB in ximage,
+ra_bmp, ra_ps, and ra_rgbe programs.  Also updated fast tone-mapping
+library to handle spectral HSR inputs at the same time.  HSR
+input handling was added in a similar fashion to pcond and pvalue
+for convenience.
+
+Added handling of hyperspectral images to normtiff, a handy program
+for quickly tone-mapping Radiance RGBE, XYZE, and now hyperspectral
+pictures, as well as IEEE float or LogLuv TIFFs.
+
+Added handling of hyperspectral pictures to pextrem, though
+results are still reported in RGB.
+
+Added accurate conversion of hyperspectral pictures to ra_xyze.
+
+Added hyperspectral picture conversion to ra_tiff, with accurate
+color when targeting 16-bit/comp., LogLuv, and float utput,
+and the approximate method for 24-bit RGB.
+
+Taoning added genssky -L option to specify global and diffuse
+illuminance values for output calibration.
+
+Created C++ class for rcontrib and example tool rxcontrib, which
+is an optional compile in the src/rt directory.  The output
+model is more general in some respects and the operations more
+efficient, but standard output is not supported, nor is ASCII
+results data.
+
+Added experimental source-skipping method to rpict for scenes
+with large number of light sources.  Currently works with
+rcontrib and separate srcsamp image-processing tool.  Controlling
+rpict options are -dS for skip bitmap specification and -dC
+for correction coefficient image.  Compile using -DSSKIPOPT
+to include this option.
+
+Added strnstr.c compatibility module in ray/src/common, since
+it isn't present on Linux-derivatives.
+
+Added WGMDfunc material type with programmable roughness and
+separate modifier paths for the different components.
+
+Added gensurf -i option at the request of Peter Apian-Bennewitz
+to reverse surface normals, mostly for data input when it is
+a bit more difficult to adjust.
+
+Added rad -N option to rholo run for multiprocessing when
+mkillum and/or mkpmap are involved in octree prep.