Build against OpenUSD 25.11 built from source with Python 3.12, OCIO 2.2.1,
OpenVDB, Ptex and Embree, replacing the 25.05/py311 mix.
Build system:
- CMAKE_PREFIX_PATH -> third_party/OpenUSD-v25.11; HDARNOLD_ROOT ->
hdArnold-v25.11. hdEmbree is bundled in the USD build now, so
HDEMBREE_USD_ROOT is no longer needed.
- FindOpenUSD: drop usd_ndr (ndr was merged into sdr in 25.11).
- hdArnold plugin renames: ndrArnold -> nodeRegistryArnold, plus the new
usdImagingArnold plugin.
- Glob the version-suffixed OpenColorIO_*.dll instead of hardcoding 2_1.
- Drop the python311.dll workaround; USD and Cycles now share Python 3.12.
- Cycles: deploy OpenColorIO_2_5.dll (needed by its bundled OpenImageIO) and
stop the debug-DLL filter from eating IlmThread.dll -- the regex `d[.]dll$`
also matched legitimate Release DLLs.
Runtime fixes:
- cullStyle now defaults to Nothing, matching usdview (viewSettingsDataModel
cullBackfaces=False). BackUnlessDoubleSided drops back faces on geometry
that isn't authored doubleSided, which hdEmbree applies to occlusion rays
too, so interiors shaded as single-sided.
- Set HDARNOLD_osl_includepath (and PXR_MTLX_STDLIB_SEARCH_PATHS) in main.cpp
before the plugin DLL pre-load. hdArnold compiles MaterialX via generated
OSL that begins with #include "mx_funcs.h"; without an include path Arnold
fails with "fatal error: 'mx_funcs.h' file not found". It must be set before
any plugin loads because TF_DEFINE_ENV_SETTING caches the value when
hdArnold.dll registers its settings.
- Deploy the MaterialX standard library next to the executable.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
README hadn't been touched since the early layer/viewport-only stage of
the project: it still described the removed LayerPanel, omitted the
Material Editor / MaterialPreviewRenderer / NodeThumbnailCache /
CurveEditorPanel / TimelinePanel entirely, and its Tests section
claimed ctest works even though BUILD_TESTS is OFF in every preset
(the two test executables have stale USD include paths, per
CLAUDE.md). Refreshes the feature list, architecture tree, and build
docs to match current source, and adds a screenshot gallery for the
Material Editor, Curve Editor, quad viewport, and MaterialX import.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
indigo