This adds path guiding features into Cycles by integrating Intel's Open Path
Guiding Library. It can be enabled in the Sampling > Path Guiding panel in the
render properties.
This feature helps reduce noise in scenes where finding a path to light is
difficult for regular path tracing.
The current implementation supports guiding directional sampling decisions on
surfaces, when the material contains a least one diffuse component, and in
volumes with isotropic and anisotropic Henyey-Greenstein phase functions.
On surfaces, the guided sampling decision is proportional to the product of
the incident radiance and the normal-oriented cosine lobe and in volumes it
is proportional to the product of the incident radiance and the phase function.
The incident radiance field of a scene is learned and updated during rendering
after each per-frame rendering iteration/progression.
At the moment, path guiding is only supported by the CPU backend. Support for
GPU backends will be added in future versions of OpenPGL.
Ref T92571
Differential Revision: https://developer.blender.org/D15286
- fix the source package download URL
- patch the `meson.build` file to allow the CentOS 7 meson version to be
used
- only build what we need (`wayland-scanner`), and not the libraries,
documentation, and tests.
Ref: D16074
This also reverts commit f6664217b3
"Build: temporarily disable wayland dependency".
This is needed to ensure and up to date "wayland-scanner" is used,
as versions before 1.20.0 generate headers incompatible with
dynamic linking (WITH_GHOST_WAYLAND_DYNLOAD).
As the centos7 version of wayland is 1.15 so make this part of Blender's
dependencies on Linux.
We intend to enable Wayland for Blender 3.4 release, this is needed for
the build-bot.
Reviewed By: brecht
Ref D16074
Match minimum supported versions from the WIKI [0] by raising them to:
- GCC 9.3.1
- CLANG 8.0
- MVCS 2019 (16.9.16 / 1928)
Details:
- Add CMake checks that ensure supported compiler versions early on.
- Previously GCC per-processor version checks served to exclude
`__clang__`, in some cases this has been replaced by explicitly
excluding `__clang__`. This was needed as CLANG treated some of these
flags differently to GCC, causing the build to fail.
- Remove USE_APPLE_OMP_FIX GCC-4.2 OpenMP workaround.
- Remove linking error workaround for old MSVC versions.
[0]: https://wiki.blender.org/wiki/Building_Blender
Reviewed by: brecht, LazyDodo
Ref D16068
This is already the case for most CMake usage.
Although some find modules are an exception to this, as they were
originally maintained externally they use some different conventions.
Also corrected bad indentation in: intern/cycles/CMakeLists.txt
- Add doc-string with example usage shown in the --help message.
- Add help text for command line arguments.
- Only search for the CMakeCache.txt file when the `--build-dir`
is omitted.
- Write fatal errors to the stderr.
The buildbot will call this script to create a binary .whl file that can be
easily installed through pip.
This wheel will only work with the same Python version used for Blender.
Other minimum system requirements are the same as regular Blender builds.
Includes contributions by Campbell Barton.
Differential Revision: https://developer.blender.org/D15957
* Use Python executable from lib folder since it's not installed.
* Make bpy module test work for portable install.
* Disable gtests which don't work with different Python link flags
and shared library locations.
Ref D15957
A continuation of previous fix for malloc hooks which got removed
from the new glibc library.
The pre-compiled jemalloc has definitions which interpose hooks
in glibc leading to linking errors with multiple hook definitions.
A simple fix is to skip doing the workaround when using jemalloc
from pre-compiled libraries.
This will likely be revisited in the future, but for now it is
important to fix compilation errors for developers.
Since this was added, Linux libraries have been included in `../lib/`.
This made `make bpy` on Linux install the `bpy` module into the bundled
SVN libraries which isn't very useful.
Now leave WITH_INSTALL_PORTABLE unset (defaulting to ON).
Python developers may reference their systems Python and disable the
option if they wish for a system-wide module installation.
As portable is already the default, setting it meant using the lite
configuration would always reset the value if was intentionally changed.
This was also inconsistent as other configurations left this unset.
This was a kind of "lite" target, disabling options such as FFMPEG and
ALEMBIC which may be useful to read/write data from the Python module.
Now fewer options have been changed.
The following options are now disabled:
- Audio support (to prevent audio devices being initialized on startup).
- Input device support such as NDOF and IME as there is no GUI.
- Blender thumbnail extraction as it's not installed as part of
the Python module.
Instead of attempting to predict what is useful to enable when building
as a Python module, developers can mix combine options e.g.
"make bpy release" or "make bpy lite".
Build against Python from precompiled libraries by default, instead of
requiring framework from python.org package install. The resulting bpy module
can still be used with any Python install of the same version.
Use the same CMake find module as Linux. This simplifies code, and makes it
possible to manually set PYTHON_* variables in CMake configuration.
Remove WITH_PYTHON_FRAMEWORK option for regular Blender build, as this doesn't
work well due to missing required Python packages. Advanced users can still
set PYTHON_ROOT_DIR=/Library/Frameworks/Python.framework/Versions/3.10 for
the same result.
This has been a pain, newer OpenVDB forcefully trying to use more recent
system TBB (oneTBB) instead of the one built by this script.
Also include a few minor unrelated fixes.
Ref T99618.
Output of make encounters path names that are single-quoted. This
causes the path to be misinterpreted and fail validation.
Resolves error in "make check_cppcheck"
Ref D15801 (partially applied)
Same as other build options, don't make it a hard requirement to have
Wayland libraries installed when it gets enabled by default.
Also fixes wayland-protocols not being found on the buildbot.
Fix typo in blender_release.cmake, and ensure that "make release" still works
when ocloc is not available. While a fatal error is useful for debugging, the
current convention is to disable features, especially in cases like this where
there is no simple way to make the feature work.
Differential Revision: https://developer.blender.org/D15774
PLATFORM_BUNDLED_LIBRARIES gathers shared libraries that will be installed
to the lib/ folder. The Blender executable gets a relative rpath pointing to
this folder as part of the install step.
The build rpath is different and uses absolute paths, so that it works for
executables like tests that are in different locations, and to support the
case where the build and install folders are different.
The system is already used for the OpenMP library on macOS. But on Linux it
will only kick in once we start using shared libraries for dependencies.
This also removes Mesa libraries from the old location, as these would cause
Blender to start with software OpenGL.
Ref T99618
