View the original community article here
Last tested: Aug 13, 2020
More Reading:
Visualization LookML object syntax: https://app.getguru.com/card/cpM55dxi/Custom-Visualizations-in-LookML\
Network Requirements for On-Prem Instances Connecting to Marketplace: https://app.getguru.com/card/i8gzyyeT/Network-Requirements-for-OnPrem-Instances-Connecting-to-Marketplace
What’s in a Marketplace Visualization? https://app.getguru.com/card/c5Gj5X7i/Whats-in-a-Marketplace-Visualization
Examples of repos that can be installed through Marketplace:
https://github.com/ContrastingSounds/vis-report_table
https://github.com/noahamac/viz-inspector
https://github.com/looker/viz-multiple_value-marketplace
If nothing else works: https://github.com/looker/custom_visualizations_v2
This content is subject to limited support.