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Comparing ray/doc/notes/ReleaseNotes (file contents):
Revision 1.398 by greg, Sat Dec 4 16:29:29 2021 UTC vs.
Revision 1.401 by greg, Fri Feb 4 20:11:49 2022 UTC

# Line 2494 | Line 2494 | Added support for depth-of-field blurring in vwrays us
2494   Also, made -c count work with vwrays -i, producing multiple samples
2495   per indicated pixel position.  At the same time, support for the -pd
2496   option was added to rtpict, which calls on vwrays for its samples.
2497 +
2498 + Fixed issue with BSDFs that didn't obey reciprocity, where direct
2499 + sampling wasn't following exactly with indirect sampling.  This was
2500 + discovered and reported by Jon Sargent.
2501 +
2502 + Created checkBSDF tool to test XML BSDF reciprocity and perform similar
2503 + sanity checks.
2504 +
2505 + Added -O option to pvalue and pextrem to report watts/sr/m^2 even if
2506 + picture is XYZE.

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