| 2600 | 
  | 
 | 
| 2601 | 
  | 
Increased octree and object limits to allow scenes with billions | 
| 2602 | 
  | 
of primitives. | 
| 2603 | 
+ | 
 | 
| 2604 | 
+ | 
Made reciprocity averaging default to "off" in bsdf2ttree, as it seems | 
| 2605 | 
+ | 
to create more problems than it solves. | 
| 2606 | 
+ | 
 | 
| 2607 | 
+ | 
==================== | 
| 2608 | 
+ | 
Version 6.0 | 
| 2609 | 
+ | 
 | 
| 2610 | 
+ | 
Extensive changes to enable spectral rendering, which defaults to "off" | 
| 2611 | 
+ | 
to maintain backwards-compatibility with previous versions, with the | 
| 2612 | 
+ | 
exception of the ambient file format, which is changed.  The MAXCSAMP | 
| 2613 | 
+ | 
macro, which defaults to 24, sets the maximum number of spectral samples. | 
| 2614 | 
+ | 
The actual number of samples is set by the "-cs" option, which defaults | 
| 2615 | 
+ | 
to 3 for rpict, rtrace, and rcontrib.  The latter two programs support | 
| 2616 | 
+ | 
straight spectral output, but rpict is initially restricted to | 
| 2617 | 
+ | 
tristimulus output pictures.  New pattern primitives "spectrum", | 
| 2618 | 
+ | 
"specfile", and "specfunc" have been added as a means to specify | 
| 2619 | 
+ | 
spectral reflectance, emittance, etc. to materials that still have | 
| 2620 | 
+ | 
only 3 color channels.  Those RGB channels will still affect the | 
| 2621 | 
+ | 
spectrum if used.  Unfortunately photon-mapping is currently broken when | 
| 2622 | 
+ | 
spectral sampling is enabled, but we will fix this as soon as possible. | 
| 2623 | 
+ | 
Calculation overhead appears to be approximately 10-15% for RGB | 
| 2624 | 
+ | 
renderings compared to version 5.4a. |