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Revision 1.82 by greg, Mon Jun 13 20:07:56 2005 UTC vs.
Revision 1.129 by greg, Thu Sep 7 05:20:54 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 1471 | Line 1471 | still use biased ray termination.)
1471  
1472   Added rtcontrib -r option to recover partial output.
1473  
1474 < Added -R rendering option for pure Monte Carlo sampling.
1475 < (Got rid of -DMC compile option, whicht his makes superfluous.)
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 > Thanks to Rick Mistrick and Younju Yoon for identifying this problem,
1574 > which was related to a poorly designed hash function.
1575 >
1576 > Changed -u+ to be the default setting in rtrace (only).
1577 >
1578 > Fixed binary i/o for rlam and vwrays under Windows.
1579 >
1580 > Added tmCvLums() to tone-mapping routines using a 16-bit lookup table
1581 > on IEEE floats, which is also used to improve speed of COLOR conversions,
1582 > especially on machines with slow log() calls.  The first call to
1583 > tmCvLums(), tmCvGrays(), or tmCvColors() initializes the table.
1584 >
1585 > Created optics2rad.csh script to convert from Optics 5 material output
1586 > to something correct for Radiance.  Built on old glazing.cal function,
1587 > which is actually incorrect so removed from the distribution.
1588 >
1589 > Fixed nuisance bug in ximage under some SGI machines that caused it to
1590 > choose an inappropriate visual and display incorrect colors.  (Thanks
1591 > to Oskar Itzinger for debugging the problem.)
1592 >
1593 > Fixed long-standing inaccuracy of pcompos -t and +t thresholding options.
1594 >
1595 > Fixed bug in handling of views with tabs rather than spaces.
1596 >
1597 > Fixed bug related to alias of alias.
1598 >
1599 > ****** COMPATIBILITY CHANGE ********
1600 > Changed default sky turbidity in gensky from the original default of
1601 > 2.75 to the CIE 110-1994 standard value of 2.45.  Thanks to Marilyne
1602 > Anderson of MIT for pointing out this discrepancy.
1603 >
1604 > Added -o option to ra_xyze to produce original pixel values.
1605 >
1606 > Fixed bug in tracing of virtual sources, where intervening glazing was
1607 > not being accounted for properly.

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