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Comparing ray/doc/notes/ReleaseNotes (file contents):
Revision 1.87 by greg, Tue Jun 14 22:23:31 2005 UTC vs.
Revision 1.110 by greg, Thu Dec 8 17:56:38 2005 UTC

# Line 1382 | Line 1382 | care to support officially due to its machine-dependen
1382   Fixed bug that caused incorrect reporting of non-surface in set when
1383   mixing meshes and instances.  (Thanks to Jack de Valpine for discovery.)
1384  
1385 < Fixed innacuracy in calculation of diffuse transmission in the presence
1385 > Fixed inaccuracy in calculation of diffuse transmission in the presence
1386   of pure specular (Fresnel reflection) using "trans" material.  Thanks
1387   to Christoph Reinhart for pointing out the error.
1388  
# Line 1483 | Line 1483 | Fixed truly ancient bug in bounding box computation fo
1483   could (and did) cause missing segments.
1484  
1485   Added -z option to normtiff to output LZW-compressed files.
1486 +
1487 + Last change to total causes it to produce results when it sees an empty
1488 + line on the input.  This was not intentional, but I decided I like this
1489 + behavior so I documented it rather than changing it.
1490 +
1491 + =====================
1492 + Version 3.8
1493 +
1494 + Fixed Russian roulette ray termination, which was doing the opposite of
1495 + what it should have been doing, resulting in overestimated values below
1496 + minimum ray sampling weight (serious).
1497 +
1498 + Changed mksource to use 98th percentile (rather than 99th) for threshold.
1499 +
1500 + (Above changes included in 3.7.1 patch release.)
1501 +
1502 + Eliminated writing of EXPOSURE= line in ra_tiff -r when source TIFF
1503 + does not have STONITS set.
1504 +
1505 + Fixed bug in ambient calculation that caused black values for multiple
1506 + bounces in some scenes.  Thanks to Mark Stock for creating and sharing
1507 + the sophisticated test scene that demonstrated this problem.
1508 +
1509 + Fixed bug in antimatter using Russian Roulette sampling.
1510 +
1511 + (Above changes included in 3.7.2 patch release 22 Aug 2005.)
1512 +
1513 + Created fieldcomb script to combine alternate fields in a rendering
1514 + sequence.  (Development generously sponsored by Iebele Abel.)
1515 +
1516 + Added missing preload of mesh objects for more efficient memory use
1517 + during parallel rendering -- this was a serious oversight.
1518 +
1519 + Created ran2tiff program to automate exposure setting of animation
1520 + sequences using a moving histogram in combination with pcond, and
1521 + converting frames to TIFF.
1522 +
1523 + Eliminated SPEED macro from makeall and source tree.
1524 +
1525 + Added -pj option to vwrays to allow jittering of sample locations.
1526 +
1527 + Fixed bug in rtcontrib where it occasionally missed writing the
1528 + final bin file.  (Pretty serious, actually.)
1529 +
1530 + Added -Dfseeko=fseek to MACH= line for linux, as fseeko(3) seems to be
1531 + broken in current versions of Linux.  (Need to remove this later.)
1532 +
1533 + Rearranged struct's for better efficiency on 64-bit architectures.
1534 +
1535 + Added -i option to rlam so it works with binary input formats.
1536 +
1537 + Added rtcontrib -bn option to specify number of bins and fixed bug
1538 + in recovery of files containing multiple values per record.
1539 +
1540 + Added rtcontrib -fo option to write over existing files, which it now
1541 + refuses to do without this option.
1542 +
1543 + Made rtcontrib flush output when handed a zero-length ray vector,
1544 + to match behavior of rtrace.
1545 +
1546 + Improved color scale for falsecolor output.
1547 +
1548 + Added threshold test for Fresnel approximation to prevent its use
1549 + on smooth surfaces with unrealistically low specularities (less than 1.8%).
1550 + Water has a specular reflectance of 2.1% at room temperture.

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