[ViewVC] Diff of: radiance/ray/doc/notes/ReleaseNotes

Comparing ray/doc/notes/ReleaseNotes (file contents):
Revision 1.396 by greg, Thu Nov 18 19:38:20 2021 UTC vs.
Revision 1.428 by greg, Wed Nov 15 18:02:52 2023 UTC

+It ended up being simple enough to derate the final average by the factor
+corresponding to average surface absorpition, thus removing the average
+from the final bounce estimate.
-+
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+Introduced ies2rad upgrades by Randolph Fritz.  Randolph says it
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+fixes the following problems:
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+. Generates correct Radiance geometry for spheres in 1995, 2002,
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+        and 2019 IES files.
-+
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+. Generates correct Radiance geometry for vertical cylinders that
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+        are taller than they are wide.
-+
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+. Ignores the file source ("File Generation Type") field in the
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+version of the file, which would otherwise be incorrectly used
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+        as an output multiplier.
-+
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+    It also offers the following enhancements:
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+. Shape information is included in the .rad file comments.
-+
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+. 1995, 2002, and 2019-version luminous opening geometry is
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+        accounted for.
-+
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+. The 2002 and 2019 IES file versions are recognized and
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+        processed appropriately.
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+. I have made an attempt to do something intelligent with less
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+        common "luminous opening" shapes in the 1995, 2002, and 2019 versions
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+        of the standard, though I have not implemented any support for new
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+        geometry; approximations are substituted and warning messages issued.
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+        Unfortunately, this code is not tested, since I don't have any IES
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+        files that use these shapes.
-+
-+
+Added support for depth-of-field blurring in vwrays using -pd option.
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+Also, made -c count work with vwrays -i, producing multiple samples
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+per indicated pixel position.  At the same time, support for the -pd
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+option was added to rtpict, which calls on vwrays for its samples.
-+
-+
+Fixed issue with BSDFs that didn't obey reciprocity, where direct
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+sampling wasn't following exactly with indirect sampling.  This was
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+discovered and reported by Jon Sargent.
-+
-+
+Created checkBSDF tool to test XML BSDF reciprocity and perform similar
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+sanity checks.
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+Added -O option to pvalue and pextrem to report watts/sr/m^2 even if
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+picture is XYZE.
-+
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+Made subtle changes to header i/o routines to preserve alignment in
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+binary file formats to enable memory-mapping.  Implemented memory-mapped
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+matrix loading in rmtxop for binary double files.
-+
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+Removed ambient value sorting, which was written when ambient caches
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+could overwhelm available memory.  This is rarely the case these days,
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+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
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+and diffuse measurements as a function of incident angle.
-+
-+
+Fixed issue with over-counting diffuse component during aBSDF
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+peak extraction.
-+
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+Added dctimestep -x and -y options to specify image dimensions
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+for multiple outputs corresponding to result vectors.
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+Added -P option to rcalc to pass formatted input when cond is <= 0.
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+Created rcrop utility for cropping matrices and pictures more
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+conveniently, correcting view information.  Expect it to be handy
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+for extracting rows and columns from matrices, mostly.
-+
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+Changed pcomb so -o option elides original exposure values
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+from indented source headers.
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+Added getinfo -r option, which is similar to -a except it will
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+replace indicated lines with new ones.
-+
-+
+Slight change to vwrays -d option to not spit out "-ld-", and to
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+produce "-ld+" without requiring input picture as argument.
-+
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+Added automatic overture calculation to rtpict with -n > 1 if
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+ambient cache is on and file is named.  If straight image output
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+is requested, we randomize all samples and avoid cache collisions.
-+
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+Added cnt -s option to shuffle output.
-+
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+Fixed issue with divide-by-zero errors in the ambient super-sampling
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+routine discovered by Jon Sargent of Solemma.  This affected regions
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+that had zero radiance, such as black backgrounds or unlit areas
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+with -av 0 0 0, when super-sampling was effectively disabled, causing
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+some loss in accuracy of the results.
-+
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+Updated Klems Half- and Quarter-bases to match angles currently used
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+in WINDOW.
-+
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+Eliminated most aiming failures for triangular light sources, at the
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+expense of conservative sampling near the centroid.  Thanks to
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+David Geisler-Moroder for his help on this.
-+
-+
+Increased maximum set size to 8191 to avoid set overflow errors.
-+
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+Added source obstruction test to statistics being kept on which
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+sources were visible in adaptive shadow testing code.  Previous
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+behavior was likely over-estimating source contributions.
-+
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+Added diffuse components into maximum directional hemispherical
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+reported by checkBSDF, so comparing to 100% is easier for each
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+component.
-+
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+Fixed incorrect calculations in iso2klems script, thanks to
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+help from Jacob Jonnson.
-+
-+
+Updated official copyright and license according to new wording
-+
+provided by Jean Haemmerle at the LBNL Intellectual Property Office.
-+
+Both were copied verbatim from e-mail I received from Taoning Wang
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+on 8/20/2022.
-+
-+
+Added -features option to rpict, rtrace, and rcontrib to check
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+which features are present or look for specific feature support.
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+This addition was suggested by Peter Apian-Bennewitz as an easier
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+way to determine which version of Radiance is installed and what
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+it supports, and is timely as we begin our refactoring of the
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+rendering code.  There are no current plans to add this to rvu.
-+
-+
+Added falsecolor -odim, -orct, and -c0 options to overlay grid of
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+values on image.  This was requested by Rob Shakespeare.
-+
-+
+Added -i* and -o* options in rhcopy for reading rays from the
-+
+standard input and writing rays from holodeck to standard output.
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+This will hopefully be useful in combining rholo with rcontrib.
-+
-+
+Added further checking for coincident (overlapping) flat surfaces,
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+preferring front sides to back sides in the ray intersection
-+
+calculation.  This only applies to rings and faces, as the other
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+surface types would have required additional calculations to
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+make them work.  Material transparency is still the primary
-+
+consideration, now followed by ray hit side, followed by
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+modifier definition order in the input.
-+
-+
+Increased octree and object limits to allow scenes with billions
-+
+of primitives.
-+
-+
+Made reciprocity averaging default to "off" in bsdf2ttree, as it seems
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+to create more problems than it solves.
-+
-+
+====================
-+
+Version 6.0
-+
-+
+Extensive changes to enable spectral rendering, which defaults to "off"
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+to maintain backwards-compatibility with previous versions, with the
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+exception of the ambient file format, which is changed.  The MAXCSAMP
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+macro, which defaults to 24, sets the maximum number of spectral samples.
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+The actual number of samples is set by the "-cs" option, which defaults
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+to 3 for rpict, rtrace, and rcontrib.  The latter two programs support
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+straight spectral output, but rpict is initially restricted to
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+tristimulus output pictures.  New pattern primitives "spectrum",
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+"specfile", and "specfunc" have been added as a means to specify
-+
+spectral reflectance, emittance, etc. to materials that still have
-+
+only 3 color channels.  Those RGB channels will still affect the
-+
+spectrum if used.  Unfortunately photon-mapping is currently broken when
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+spectral sampling is enabled, but we will fix this as soon as possible.
-+
+Calculation overhead appears to be approximately 10-15% for RGB
-+
+renderings compared to version 5.4a.

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Comparing ray/doc/notes/ReleaseNotes (file contents): Revision 1.396 by greg, Thu Nov 18 19:38:20 2021 UTC vs. Revision 1.428 by greg, Wed Nov 15 18:02:52 2023 UTC

Diff Legend

Comparing ray/doc/notes/ReleaseNotes (file contents):
Revision 1.396 by greg, Thu Nov 18 19:38:20 2021 UTC vs.
Revision 1.428 by greg, Wed Nov 15 18:02:52 2023 UTC