--- ray/doc/notes/ReleaseNotes	2022/04/11 18:08:19	1.414
+++ ray/doc/notes/ReleaseNotes	2022/08/10 20:45:09	1.418
@@ -2544,3 +2544,18 @@ ambient cache is on and file is named.  If straight im
 is requested, we randomize all samples and avoid cache collisions.
 
 Added cnt -s option to shuffle output.
+
+Fixed issue with divide-by-zero errors in the ambient super-sampling
+routine discovered by Jon Sargent of Solemma.  This affected regions
+that had zero radiance, such as black backgrounds or unlit areas
+with -av 0 0 0, when super-sampling was effectively disabled, causing
+some loss in accuracy of the results.
+
+Updated Klems Half- and Quarter-bases to match angles currently used
+in WINDOW.
+
+Eliminated most aiming failures for triangular light sources, at the
+expense of conservative sampling near the centroid.  Thanks to
+David Geisler-Moroder for his help on this.
+
+Increased maximum set size to 8191 to avoid set overflow errors.