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cycles/BUILDING.md

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Building Cycles

Quick Setup

Ensure the following software is installed and available in the PATH:

  • Git
  • Subversion
  • Python 3
  • CMake

Quick build setup on Windows, macOS and Linux is as follows:

git clone https://projects.blender.org/blender/cycles.git

cd cycles
make update
make

This will download the Cycles source code, download precompiled libraries, configure CMake, and build.

The resulting binary will be at:

./install/cycles

Hydra Render Delegate with USD Repository

This will make the render delegate work with usdview and other applications built using the USD repository. USD version 21.11 or newer is required.

USD includes a script to build itself and all required dependencies and then install the result a specified directory.

git clone https://github.com/PixarAnimationStudios/USD.git
cd USD
python3 build_scripts/build_usd.py "<path to USD install>"

Build Cycles pointing to this directory.

cmake -B ./build -DPXR_ROOT="<path to USD install>"
make

Test in usdview.

PYTHONPATH=<path to USD install>/lib/python PXR_PLUGINPATH_NAME=<path to cycles>/install/hydra <path to USD install>/bin/usdview

Hydra Render Delegate for Houdini

For use in Houdini, Cycles must be built using Houdini's USD libraries. Houdini version 19 or newer is required.

cmake -B ./build -DHOUDINI_ROOT="<path to Houdini>"
make

The path to Houdini depends on the operating system, typically:

  • Linux: /opt/hfsX.Y
  • macOS: /Applications/Houdini/HoudiniX.Y.ZZZ
  • Windows: C:/Program Files/Side Effects Software/Houdini X.Y.ZZZ

Test in Houdini using an environment variable.

PXR_PLUGINPATH_NAME=<path to cycles>/install/houdini/dso/usd_plugins houdini

Or copy install/houdini/packages/cycles.json to the Houdini packages directory to make it always available.

Build System

Cycles uses the CMake build system. As an alternative to the make wrapper, CMake can be manually configured.

See the CMake configuration to enable and disable various features.

The precompiled libraries are shared with Blender, and will be automatically downloaded from the Blender repository with make update. They can also be manually downloaded from:

https://svn.blender.org/svnroot/bf-blender/trunk/lib/

The precompiled libraries are expected to be in a lib/<platform> folder next to the cycles/ source folder.

Dependencies

Core Cycles has the following required and optional library dependencies. These are all included in precompiled libraries.

Required:

  • OpenImageIO
  • TBB

Optional:

  • Alembic
  • Embree
  • OpenColorIO
  • OpenVDB / NanoVDB
  • OpenShadingLanguage
  • OpenImageDenoise
  • USD

For GUI support, the following libraries are required. The SDL library must be manually provided, it's not part of the precompiled libraries.

  • OpenGL
  • GLEW
  • SDL

For GPU rendering support on NVIDIA cards, these need to be downloaded and installed from the NVIDIA website.

  • CUDA Toolkit 11 or newer
  • OptiX 7.3 SDK or newer