Download of Lustre 2.5 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. Lustre lies within Photo & Graphics Tools, more precisely 3D Design. This software was originally developed by Autodesk, Inc.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The program's installer files are commonly found as lustre.exe or assistant.exe etc. The most popular version of the software is 2.5.
From the developer:
Autodesk Lustre software offers real-time color grading for creative look development. Lustre provides precise control over color for primary and secondary grading in both mono- and stereoscopic 3D workflows.
Grow your business beyond color grading. Lustre is now part of Autodesk Flame Premium software, Autodesk’s ultimate finishing toolset.
You may want to check out more software, such as Briz LUT Converter, which might be related to Lustre.