| 2575 |
|
provided by Jean Haemmerle at the LBNL Intellectual Property Office. |
| 2576 |
|
Both were copied verbatim from e-mail I received from Taoning Wang |
| 2577 |
|
on 8/20/2022. |
| 2578 |
+ |
|
| 2579 |
+ |
Added -features option to rpict, rtrace, and rcontrib to check |
| 2580 |
+ |
which features are present or look for specific feature support. |
| 2581 |
+ |
This addition was suggested by Peter Apian-Bennewitz as an easier |
| 2582 |
+ |
way to determine which version of Radiance is installed and what |
| 2583 |
+ |
it supports, and is timely as we begin our refactoring of the |
| 2584 |
+ |
rendering code. There are no current plans to add this to rvu. |
| 2585 |
+ |
|
| 2586 |
+ |
Added falsecolor -odim, -orct, and -c0 options to overlay grid of |
| 2587 |
+ |
values on image. This was requested by Rob Shakespeare. |
| 2588 |
+ |
|
| 2589 |
+ |
Added -i* and -o* options in rhcopy for reading rays from the |
| 2590 |
+ |
standard input and writing rays from holodeck to standard output. |
| 2591 |
+ |
This will hopefully be useful in combining rholo with rcontrib. |
| 2592 |
+ |
|
| 2593 |
+ |
Added further checking for coincident (overlapping) flat surfaces, |
| 2594 |
+ |
preferring front sides to back sides in the ray intersection |
| 2595 |
+ |
calculation. This only applies to rings and faces, as the other |
| 2596 |
+ |
surface types would have required additional calculations to |
| 2597 |
+ |
make them work. Material transparency is still the primary |
| 2598 |
+ |
consideration, now followed by ray hit side, followed by |
| 2599 |
+ |
modifier definition order in the input. |
| 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. |
