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Comparing ray/doc/notes/ReleaseNotes (file contents):
Revision 1.375 by greg, Thu Sep 3 15:46:32 2020 UTC vs.
Revision 1.382 by greg, Sun Jan 31 18:08:04 2021 UTC

# Line 2384 | Line 2384 | the sun is not visible above the horizon.
2384  
2385   =========================
2386   Version 5.4
2387 +
2388 + Added rcollate -c option to force operation to continue even if it
2389 + seems unnecessary.  Made tool more robust.
2390 +
2391 + Added -t option to rcontrib (and rfluxmtx) to report progress after the
2392 + given number of seconds.
2393 +
2394 + Added "test" target to makeall to run unit tests.
2395 +
2396 + Modified bsdf2ttree to allow different parameters per input SIR file.
2397 +
2398 + Fixed issues with very large matrix files (> 2GB) in dctimestep, rmtxop,
2399 + and rcollate.
2400 +
2401 + Added -rf and -rb options to rmtxop to load front or back reflectance
2402 + matrix data from XML file rather than transmission.  (Lars Grobe suggested.)
2403 +
2404 + Improved behavior for coincident surfaces with different materials.
2405 + Rather than returning one surface or the other based on floating-point
2406 + vagaries, opaque materials are now preferred over transparent ones.
2407 + If the materials are both transparent or both opaque, then whichever
2408 + surface appeared later in the scene description will be selected.
2409 + This came of a request for consistent behavior with legal CAD output
2410 + from Peter Apian-Bennewitz.

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