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Comparing ray/doc/notes/ReleaseNotes (file contents):
Revision 1.63 by greg, Tue Jan 18 03:59:41 2005 UTC vs.
Revision 1.71 by greg, Tue Apr 19 01:15:06 2005 UTC

# Line 1395 | Line 1395 | which is now preserved by the various view file routin
1395   by the vwright command.
1396  
1397   Added DBLUR variable to ranimate and pmdblur script to handle simultaneous
1398 < motion and depth-of-field blurring.
1398 > motion and depth-of-field blurring.  Thanks to Visarc for funding this work.
1399 >
1400 > Added setting of focus distance in rvu ("focus" command) and rholo
1401 > ('f'/"frame" command).
1402 >
1403 > Changed default remote shell in ranimate to "ssh" rather than "rsh",
1404 > which has been abandoned on most Unix systems due to security issues.
1405 >
1406 > Fixed behavior of source primitive using illum with no alternate
1407 > material.  These now become transparent so one can see the sky or
1408 > light-probe background for use in image-based lighting.  Previously,
1409 > the user needed to specify the background glow as the alternate
1410 > material for a distant illum source to behave properly.  (This still
1411 > works.)
1412 >
1413 > Fixed some minor problems and inconsistencies with 16-bit/channel
1414 > TIFF i/o in ra_tiff.
1415 >
1416 > Created mksource program to generate distant sources for improved
1417 > image-based lighting with light probes.
1418 >
1419 > Changed ambient calculation so that -ad will not limit recursion
1420 > depth, and a minimum of 27 samples will be sent out for each stored
1421 > ambient value, or 3 samples if -aa is 0 (caching off).
1422 >
1423 > Added -oM option to rtrace to report material (rather than modifier)
1424 > for cases where actual material is aliased or further up modifier chain.
1425 >
1426 > Rearranged the way ray contributions are computed so that it might be
1427 > possible to use rtrace to derive daylight coefficients and optical
1428 > transfer functions.  The new -oTW option of rtrace produces color
1429 > contribution weights for each ray, which combined with the -ti (or -tI)
1430 > option permits the contribution of selected surfaces or sources to
1431 > be determined.  Using the -oTW option, one should also specify
1432 > options "-dt 0 -aa 0 -as 0" for optimal results.  In particular,
1433 > one cannot expect reasonable tallies with -ab >= 1 and irradiance
1434 > caching on (-aa > 0).
1435 >
1436 > The same code modifications included a change to the indirect computation
1437 > with caching switched off (-aa 0).  Whereas before, the number of secondary
1438 > rays after the first bounce were half of the previous generation, they are
1439 > now determined by the surface reflectance, making for a better and faster
1440 > calculation.  It should now be possible to compute many bounces with -aa 0,
1441 > which used to be prohibitively expensive.

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