You can download some test scenes that use the new "Inside Volume" mode for the CoronaVolumeMtl in Corona Renderer 2. These are the scenes and settings used for the Development Insights and New Features videos: https://data.corona-renderer.com/download/materials/corona-renderer-2-sample-3d-volume-material-scenes.zip (https://data.corona-renderer.com/download/materials/corona-renderer-2-sample-3d-volume-material-scenes.zip)
(https://forum.corona-renderer.com/index.php?action=dlattach;topic=21091.0;attach=87906;image)