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Comparing ray/doc/notes/ReleaseNotes (file contents):
Revision 1.79 by greg, Thu Jun 2 04:47:26 2005 UTC vs.
Revision 1.119 by greg, Wed Apr 5 14:30:38 2006 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 1465 | Line 1465 | Made rtcontrib -f option search RAYPATH directories.
1465   Made it so -o option of rtcontrib can pipe -o output to a command.
1466  
1467   Added -if and -of options to total for binary i/o (following rcalc mold).
1468 +
1469 + Switched default options in rtrace to use Russian roulette.  (Rpict and rvu
1470 + still use biased ray termination.)
1471 +
1472 + Added rtcontrib -r option to recover partial output.
1473 +
1474 + Added -u rendering option for pure Monte Carlo sampling.
1475 + (Got rid of -DMC compile option, which this makes superfluous.)
1476 +
1477 + Changed -t option of rlam to accept strings as well as single characters.
1478 +
1479 + Fixed bug in rcalc with -l option where it would sometimes go into an
1480 + infinite loop.
1481 +
1482 + Fixed truly ancient bug in bounding box computation for cones, which
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.
1551 +
1552 + Removed NICE macro settings in rpict and rtrace, which was slowing down
1553 + the processes under Mac OS X (10.4) by about 60% due to processor napping.
1554 +
1555 + Made xform, replmarks and rad2mgf handle quoted modifiers and names properly.
1556 +
1557 + Fixed problem in genblinds, where it was generating slats that were too
1558 + wide with the +/-r option.  (Thanks to Helena Buelow-Huebe for discovering
1559 + this bug.)
1560 +
1561 + Fixed bug in ra_ppm for 16-bit/sample i/o, where it was getting the byte
1562 + order wrong (apparently).
1563 +
1564 + Added -V option to rtcontrib to report actual contributions, rather than
1565 + just ray coefficients.
1566 +
1567 + Fixed bug in ranimate that caused it to fail in continuation of renderings.
1568 +
1569 + Renamed librt.a to librtrad.a, to avoid conflict on Solaris. Almost
1570 + everything now gets linked to -lrtrad instead of -lrt.
1571 +
1572 + Fixed problem with large sample sets, so -u+ option now is truly random.
1573 +
1574 + Changed -u+ to be the default setting in rtrace (only).

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