pre-built binaries for VisIt 2.10 + OSPRay 1.1.0 for 64-bit Linux.
Once you've downloaded and untarred the tarball, you will get the following directory structure:
-- visitospray_2.10/ |-- ospray/ `-- visit2_10_0.linux-x86_64/
cd into visitospray_2.10/visit2_10_0.linux-x86_64/bin and run the following:
OpenSWR was added as a part of the Mesa library as of Mesa 12. While the pre-built VisIt included in the tarball has Mesa support, it by default uses a version <12. Using a newer version is fairly simple. You may be able to get Mesa 12+ through your package manager, depending on your OS. If not, or if you want the newest version (17 at time of writing), then you will have to build it.
The suggested way to build Mesa specifically with OpenSWR support is:
To use Mesa/OpwnSWR, set the following environment variables before running VisIt.