--- ray/doc/notes/ReleaseNotes	2022/02/04 20:11:49	1.401
+++ ray/doc/notes/ReleaseNotes	2022/04/10 03:46:27	1.412
@@ -2504,3 +2504,41 @@ sanity checks.
 
 Added -O option to pvalue and pextrem to report watts/sr/m^2 even if
 picture is XYZE.
+
+Made subtle changes to header i/o routines to preserve alignment in
+binary file formats to enable memory-mapping.  Implemented memory-mapped
+matrix loading in rmtxop for binary double files.
+
+Removed ambient value sorting, which was written when ambient caches
+could overwhelm available memory.  This is rarely the case these days,
+and the added code complexity and updating of cache values with LRU
+counts dirties pages that would otherwise remain clean, so it was
+often a loss even when VM was an issue.
+
+Added iso2klems script to compute a Klems BSDF based on specular
+and diffuse measurements as a function of incident angle.
+
+Fixed issue with over-counting diffuse component during aBSDF
+peak extraction.
+
+Added dctimestep -x and -y options to specify image dimensions
+for multiple outputs corresponding to result vectors.
+
+Added -P option to rcalc to pass formatted input when cond is <= 0.
+
+Created rcrop utility for cropping matrices and pictures more
+conveniently, correcting view information.  Expect it to be handy
+for extracting rows and columns from matrices, mostly.
+
+Changed pcomb so -o option elides original exposure values
+from indented source headers.
+
+Added getinfo -r option, which is similar to -a except it will
+replace indicated lines with new ones.
+
+Slight change to vwrays -d option to not spit out "-ld-", and to
+produce "-ld+" without requiring input picture as argument.
+
+Added automatic overture calculation to rtpict with -n > 1 if
+ambient cache is on and file is named.  Random image sampling
+avoids some of the issues with redundant calculations but not all.