We provide a free evaluation version of our VAO Unity plugin (with watermark).
It contains all the features of a full version, except it does not run on Unity 5.6 (only Unity 2017.2 and higher). Please note that the new temporal algorithms may render a few artifacts, which are only visible in the editor - not in the play mode. This does not apply to the full version.
If you like VAO and want to use it please buy it at Unity Asset Store to support its development. Also let us know what you think, your feedback is welcome.
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In case of questions or further issues, please contact us at projectwilberforce@gmail.com