--- ray/doc/notes/ReleaseNotes	2025/03/19 01:18:20	1.478
+++ ray/doc/notes/ReleaseNotes	2025/04/04 18:06:48	1.481
@@ -2775,3 +2775,17 @@ This follows the request and recommendations of David 
 Removed limitation in rfluxmtx, which was disallowing distant
 and local receivers. Found this to be a perfectly valid approach
 for some annual daylighting scenarios.
+
+Wrote new pvsum tool to handle cases dctimestep can't, like
+spectral input pictures.  It also adds a -N option for multi-
+processing on Unix machines, which utilizes memory-mapped
+inputs for efficient i/o sharing.
+
+Made it so genBSDF can use spectral rendering for a
+more accurate photometric result.
+
+Changed default matrix representation to float rather than
+double, which uses less RAM and supports faster operations
+in general.  Build with compiler flag:
+	-DDTnativeDTrmx_native=DTdouble
+to get back higher precision representation.