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

Comparing ray/doc/notes/ReleaseNotes (file contents):
Revision 1.414 by greg, Mon Apr 11 18:08:19 2022 UTC vs.
Revision 1.465 by greg, Fri Oct 4 18:49:06 2024 UTC

+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
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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.
-+
-+
+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.
-+
-+
+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.
-+
-+
+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
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+provided by Jean Haemmerle at the LBNL Intellectual Property Office.
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+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
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+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
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+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
-+
+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
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+spectral reflectance, emittance, etc. to materials that still have
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+only 3 color channels.  Those RGB channels will still affect the
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+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.
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+Calculation overhead appears to be approximately 10-15% for RGB
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+renderings compared to version 5.4a.
-+
-+
+Added spectral rendering to rvu as well, and made -cs and -cw
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+options standard across the rendering library.  I also brought
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+mkillum, ranimove, rsensor, and mksource into the fold.  These
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+tools were broken in the initial release.  (Hopefully, they are
-+
+working now, but none have been tested as yet.)
-+
+There was also an indexing bug in the spectral->RGB conversions
-+
+that made reds into blues and vice versa, which has been fixed.
-+
-+
+Added i/o for spectral pictures to rmtxop, the first program that can
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+ingest them.  (Only rtrace, rcontrib, and rfluxmtx can render them.)
-+
+New symbolic rmtxop -c options, such as RGB, XYZ, S (for scotopic)
-+
+and M (for melanopic) make color conversions simpler.  Alternatively,
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+a reference matrix or picture may be given and the color space of
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+that file will be used.  The -C option takes either a symbolic
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+color space or reference file and is "sticky," so it applies to
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+all subsequent input files that do not have their own -c right ahead
-+
+of them.
-+
-+
+Added spectral picture support to rcrop and radcompare.
-+
-+
+Added new utility, rcomb, which is something like a combination
-+
+of rmtxop and pcomb, it works with all the inputs and
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+outputs that rmtxop handles, but allows for general expressions
-+
+like those in pcomb for putting matrices together, working on
-+
+an element at a time.  (No resizing of matrices or accessing
-+
+neighboring elements, as permitted in pcomb.)  It saves memory
-+
+over rmtxop by operating on a row at a time, so can handle
-+
+input and output matrices with any number of rows.  It does
-+
+provide for a single matrix-multiplication operation at the end,
-+
+which only requires memory for that final matrix.
-+
-+
+Added support for filtering hyperspectral images to pfilt.
-+
-+
+Added support for 1- and 3-component float matrix i/o to
-+
+pcomb to allow for better interoperability.
-+
-+
+Added support for -co+ option to rtpict, so it can directly
-+
+produce hyperspectral images.
-+
-+
+Added new "specdata" and "specpict" primitives to support
-+
+interpolated spectral data files and hyperspectral images
-+
+as patterns.
-+
-+
+Added support for multispectal sampling in rsensor, which will
-+
+put out as many color channels as specified in any -cs option
-+
+(default is 3 for RGB).
-+
-+
+Added ability of mgf2rad to convert spectral data at least
-+
+for light, glow, plastic, and metal primitive types.  Need
-+
+to use new '-s' option to get new output.
-+
-+
+Added handling of spectral images to rcode2bmp script.
-+
-+
+Minor change to rcollate to allow explicit byte records to
-+
+be any specified length without checks against header input.
-+
-+
+Added new hemisphere type to rfluxmtx, "h=cie" for CIE sky
-+
+scanner positions.  These are 145 patches with identical
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+row counts to Tregenza, but starting from a different
-+
+azimuth and reversing row directions at adjacent altitudes.
-+
-+
+Added optimization for long argument lists and arrays in
-+
+the calcomp routines used for rendering and in rcalc, etc.
-+
-+
+Added error estimate spreading to ambient super-sampling
-+
+algorithm (-as) to improve performance especially in
-+
+scenes with sharp cut-offs.
-+
-+
+Added -i option to gendaymtx to match -i option of gendaylit.
-+
+Thanks to Yongqing for initial implementation.
-+
-+
+Changed rcrop so negative #rows or #cols counts back from end.
-+
-+
+Added rcomb -n option for multi-processing of very large matrices.
-+
-+
+Made it so rsplit and rlam can handle any number of input files
-+
+up to active open file descriptor limit.
-+
-+
+Taoning Wang added genssky tool for generating spectral sky
-+
+descriptions.
-+
-+
+Taoning added gensdaymtx utility based on gendaymtx, and
-+
+added epw2wea -a option to include required information.
-+
-+
+Fixed bug introduced in Auguest 2022 (5.4 release) in distant
-+
+light source sampling, which caused aiming failures.  (Thanks
-+
+to Mike DiPompeo of LightStanza for reporting the issue.)
-+
-+
+Added rxpict rendering tool based on C++ RpictSimulManager class.
-+
+Multi-processing and spectral output are supported.
-+
-+
+Added crude ability to read and convert spectra to RGB in ximage,
-+
+ra_bmp, and ra_rgbe programs.  Also updated fast tone-mapping
-+
+library to handle spectral HSR inputs at the same time.  HSR
-+
+input handling was added in a similar fashion to pcond and pvalue.
-+
-+
+Wrote rxpiece tool that will render pictures using tiling and
-+
+can handle different output formats and hyperspectral pictures.
-+
+Only runs on a single machine, however -- now NFS locking on
-+
+shared volumes.  Mainly a demonstration tool for RpictSimulManager
-+
+C++ class, but may have its uses.
-+
-+
+Fixed a bug in BSDF sampling of sources pointed out by
-+
+David Geisler-Moroder, which tended to overestimate specular
-+
+contributions for some BSDFs.
-+
-+
+Added handling of hyperspectral pictures to pextrem, though
-+
+results are still reported in RGB.
-+
-+
+Added conversion of hyperspectral pictures to ra_xyze, although
-+
+it is even slower than rcomb for this process.  It is more
-+
+accurate than most of the other tools, at least.
-+
-+
+Added handling of hyperspectral images to normtiff, a little-used
-+
+but handy program for quickly tone-mapping pictures and TIFFs.
-+
-+
+Added conversion of hyperspectral pictures to ra_ps using
-+
+approximate color method.
-+
-+
+Added hyperspectral picture conversion to ra_tiff, with accurate
-+
+color when targeting 16-bit/comp. or LogLuv output, and approximate
-+
+method for 24-bit RGB.

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Comparing ray/doc/notes/ReleaseNotes (file contents): Revision 1.414 by greg, Mon Apr 11 18:08:19 2022 UTC vs. Revision 1.465 by greg, Fri Oct 4 18:49:06 2024 UTC

Diff Legend

Comparing ray/doc/notes/ReleaseNotes (file contents):
Revision 1.414 by greg, Mon Apr 11 18:08:19 2022 UTC vs.
Revision 1.465 by greg, Fri Oct 4 18:49:06 2024 UTC