find_package(pxr REQUIRED) what is the pxr pakage?and where to download the lib ? Thanks!

[disini]

Hi guys,

moonray/hydra/hdMoonray/CMakeLists.txt:42 (find_package)

# the DWA installation of pxrConfig.cmake lives in
# the usd_imaging Rez package. To work correctly, it
# requires env vars REZ_USD_CORE_ROOT, REZ_USD_IMAGING_ROOT
# and PXR_INCLUDE_DIRS to be set (e.g. in CMake preset).
# A standard installation should not require these...
if(NOT pxr_FOUND)
    find_package(pxr REQUIRED)
endif()

what is the pxr ? and where to download that package ? and which version should I use ?

Thanks a lot !

[teachmain]

pxr is the package name of OpenUSD, see here, hydra is part of this project