Rendering things underwater is fun! More ND renders here.

https://help.autodesk.com/view/ARNOL/ENU/?guid=arnold_user_guide_ac_transmission_ac_nested_dielectrics_html

A selection of 48 High Dynamic Range light sources in supreme quality for production level high-end rendering.

https://pingo.gumroad.com/l/HDRfl?fbclid=IwAR3mR9M6SSVjlvwegHO2F5VYAaGplPg2v0JwxpemCxfPb1cXuGxFHPTMRww

Fantastic (free edition) arcade salon scene by @alezzmateo https://alexmateo.gumroad.com/l/xmudv?layout=profile&recommended_by=library

$10 dollar version has some great lighting breakdown videos.

nested dielectrics in #arnoldrenderer https://help.autodesk.com/view/ARNOL/ENU/?guid=arnold_user_guide_ac_transmission_ac_nested_dielectrics_html

create_plexus_from_points from MJCG compounds. More here.