--- ray/doc/notes/ReleaseNotes	2021/02/16 20:06:06	1.386
+++ ray/doc/notes/ReleaseNotes	2021/04/05 19:56:18	1.390
@@ -2420,3 +2420,15 @@ Thanks to Helen Rose Wilson for the suggestion and inf
 such a thing exists.
 
 Removed upper limit on number of modifiers in rcontrib.
+
+Put cap on maximum ambient gradient to avoid over-extrapolation of
+poorly computed irradiance cache values.
+
+Added robjutil +T option to triangulate all faces in .OBJ description.
+
+Altered BSDF library to have both front and back diffuse transmittance
+values, which can be different.  This was necessary to avoid issues
+caused by measurement and modeling discrepancies.
+
+Added pabopto2bsdf -g option to cull near-grazing scattering to avoid
+issues with noise and negative values.