--- ray/doc/notes/ReleaseNotes 2005/06/09 17:27:27 1.81 +++ ray/doc/notes/ReleaseNotes 2007/11/17 01:13:51 1.141 @@ -1382,7 +1382,7 @@ care to support officially due to its machine-dependen Fixed bug that caused incorrect reporting of non-surface in set when mixing meshes and instances. (Thanks to Jack de Valpine for discovery.) -Fixed innacuracy in calculation of diffuse transmission in the presence +Fixed inaccuracy in calculation of diffuse transmission in the presence of pure specular (Fresnel reflection) using "trans" material. Thanks to Christoph Reinhart for pointing out the error. @@ -1470,3 +1470,176 @@ Switched default options in rtrace to use Russian roul still use biased ray termination.) Added rtcontrib -r option to recover partial output. + +Added -u rendering option for pure Monte Carlo sampling. +(Got rid of -DMC compile option, which this makes superfluous.) + +Changed -t option of rlam to accept strings as well as single characters. + +Fixed bug in rcalc with -l option where it would sometimes go into an +infinite loop. + +Fixed truly ancient bug in bounding box computation for cones, which +could (and did) cause missing segments. + +Added -z option to normtiff to output LZW-compressed files. + +Last change to total causes it to produce results when it sees an empty +line on the input. This was not intentional, but I decided I like this +behavior so I documented it rather than changing it. + +===================== +Version 3.8 + +Fixed Russian roulette ray termination, which was doing the opposite of +what it should have been doing, resulting in overestimated values below +minimum ray sampling weight (serious). + +Changed mksource to use 98th percentile (rather than 99th) for threshold. + +(Above changes included in 3.7.1 patch release.) + +Eliminated writing of EXPOSURE= line in ra_tiff -r when source TIFF +does not have STONITS set. + +Fixed bug in ambient calculation that caused black values for multiple +bounces in some scenes. Thanks to Mark Stock for creating and sharing +the sophisticated test scene that demonstrated this problem. + +Fixed bug in antimatter using Russian Roulette sampling. + +(Above changes included in 3.7.2 patch release 22 Aug 2005.) + +Created fieldcomb script to combine alternate fields in a rendering +sequence. (Development generously sponsored by Iebele Abel.) + +Added missing preload of mesh objects for more efficient memory use +during parallel rendering -- this was a serious oversight. + +Created ran2tiff program to automate exposure setting of animation +sequences using a moving histogram in combination with pcond, and +converting frames to TIFF. + +Eliminated SPEED macro from makeall and source tree. + +Added -pj option to vwrays to allow jittering of sample locations. + +Fixed bug in rtcontrib where it occasionally missed writing the +final bin file. (Pretty serious, actually.) + +Added -Dfseeko=fseek to MACH= line for linux, as fseeko(3) seems to be +broken in current versions of Linux. (Need to remove this later.) + +Rearranged struct's for better efficiency on 64-bit architectures. + +Added -i option to rlam so it works with binary input formats. + +Added rtcontrib -bn option to specify number of bins and fixed bug +in recovery of files containing multiple values per record. + +Added rtcontrib -fo option to write over existing files, which it now +refuses to do without this option. + +Made rtcontrib flush output when handed a zero-length ray vector, +to match behavior of rtrace. + +Improved color scale for falsecolor output. + +Added threshold test for Fresnel approximation to prevent its use +on smooth surfaces with unrealistically low specularities (less than 1.8%). +Water has a specular reflectance of 2.1% at room temperture. + +Removed NICE macro settings in rpict and rtrace, which was slowing down +the processes under Mac OS X (10.4) by about 60% due to processor napping. + +Made xform, replmarks and rad2mgf handle quoted modifiers and names properly. + +Fixed problem in genblinds, where it was generating slats that were too +wide with the +/-r option. (Thanks to Helena Buelow-Huebe for discovering +this bug.) + +Fixed bug in ra_ppm for 16-bit/sample i/o, where it was getting the byte +order wrong (apparently). + +Added -V option to rtcontrib to report actual contributions, rather than +just ray coefficients. + +Fixed bug in ranimate that caused it to fail in continuation of renderings. + +Renamed librt.a to librtrad.a, to avoid conflict on Solaris. Almost +everything now gets linked to -lrtrad instead of -lrt. + +Fixed problem with large sample sets, so -u+ option now is truly random. +Thanks to Rick Mistrick and Younju Yoon for identifying this problem, +which was related to a poorly designed hash function. + +Changed -u+ to be the default setting in rtrace (only). + +Fixed binary i/o for rlam and vwrays under Windows. + +Added tmCvLums() to tone-mapping routines using a 16-bit lookup table +on IEEE floats, which is also used to improve speed of COLOR conversions, +especially on machines with slow log() calls. The first call to +tmCvLums(), tmCvGrays(), or tmCvColors() initializes the table. + +Created optics2rad.csh script to convert from Optics 5 material output +to something correct for Radiance. Built on old glazing.cal function, +which is actually incorrect so removed from the distribution. + +Fixed nuisance bug in ximage under some SGI machines that caused it to +choose an inappropriate visual and display incorrect colors. (Thanks +to Oskar Itzinger for debugging the problem.) + +Fixed long-standing inaccuracy of pcompos -t and +t thresholding options. + +Fixed bug in handling of views with tabs rather than spaces. + +Fixed bug related to alias of alias. + +****** COMPATIBILITY CHANGE ******** +Changed default sky turbidity in gensky from the original default of +2.75 to the CIE 110-1994 standard value of 2.45. Thanks to Marilyne +Anderson of MIT for pointing out this discrepancy. + +Added -o option to ra_xyze to produce original pixel values. + +Fixed bug in tracing of virtual sources, where intervening glazing was +not being accounted for properly. + +Added -h option to pcompos and pcomb to eliminate verbose headers. + +===================== +Version 3.9 + +Added -spec option to falsecolor to restore original spectral color scale. +Also added "-s auto" option to automatically set the maximum value. + +Added byte-swapping input and output to rcalc. + +Additional error-checking for source surfaces. + +Re-fixed bug in octree code that caused it to allocate 8 times as +much memory as it actually used(!) -- this was pointed out way back +in 1999 by Erik Reinhard and Erik Jansen, but the fix they gave me +got lost in the slightly borken release process at the time. This +should make a big difference in memory usage, especially for the +new mesh primitive. (I measured 30% less memory usage.) + +Corrected ray weights for material mixtures. + +Reduced the default -n setting for obj2mesh to take better advantage +of the smaller octree structure size. + +Fixed bug in shadow cache where it was adding surfaces with antimatter +holes cut in them to the obstructor list. Thanks to John Mardaljevic +for discovering and reporting the problem. + +Adding ability in mkillum to incorporate BSDF data in calculation. +Internal interface (raypcalls) now used in place of rtrace process(es). + +Fixed pixel alignment in pcomb for size reduction and enlargement. + +Allow rtcontrib user to set -P and -PP options for persistent rendering. +The only caveat is that -n setting > 1 requires -PP rather than -P. + +Added -c option to rtcontrib to facilitate cumulative calculations.