# NEW RELEASE: Rayleigh V1.0.0

**URL:** <https://community.geodynamics.org/t/new-release-rayleigh-v1-0-0/2101>\
**Category:** Announcements\
**Created:** [November 18, 2021, 4:57pm UTC](https://community.geodynamics.org/t/new-release-rayleigh-v1-0-0/2101 "2021-11-18T16:57:16Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ljhwang](https://yyz2.discourse-cdn.com/flex036/user_avatar/community.geodynamics.org/ljhwang/32/8_2.png) [@ljhwang](https://community.geodynamics.org/u/ljhwang)\
**Post date:** [November 18, 2021, 4:57pm UTC](https://community.geodynamics.org/t/new-release-rayleigh-v1-0-0/2101/1 "2021-11-18T16:57:16Z")

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Hi

Rayleigh v1.0.0 was released on November 12 with various new features and bugfixes. Among others, this release includes the following significant changes:

- New: Online, up-to-date documentation is now available [here](https://rayleigh-documentation.readthedocs.io/en/latest/index.html). The source files are provided as part of the repository and are stored in the `doc` directory.
- New: Users can now specify custom generic boundary conditions and/or initial conditions. The online documentation provides instructions for both options within the [Physics Controls](https://rayleigh-documentation.readthedocs.io/en/latest/doc/source/User_Guide/physics.html) section.
- New: Users are free to fully specify the set of constant and nonconstant coefficients that define the system of PDEs solved by Rayleigh. This capability is described in the “Custom Reference State” section of the documentation.  
\*New: Checkpoint format has changed such that each checkpoint resides in its own directory. All files and information needed to restart a model, including a copy of `main_input` , are now stored within each numbered checkpoint directory.

Download the latest release [here](https://geodynamics.hubzero.org/resources/1577)

- Nicholas Featherstone, Philipp Edelmann, Rene Gassmoeller, Loren Matilsky, Ryan Orvedahl, Cian Wilson, and many other contributors.

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<div class="post-metadata">

**Author:** ![ljhwang](https://yyz2.discourse-cdn.com/flex036/user_avatar/community.geodynamics.org/ljhwang/32/8_2.png) [@ljhwang](https://community.geodynamics.org/u/ljhwang)\
**Post date:** [January 3, 2022, 2:16am UTC](https://community.geodynamics.org/t/new-release-rayleigh-v1-0-0/2101/2 "2022-01-03T02:16:47Z")

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A bug fix for this release is available for download [v1.0.1](https://doi.org/10.5281/zenodo.5774038)

See also [Rayleigh](https://geodynamics.hubzero.org/resources/1577/about).