By Owen Lloyd, 1715050732
The current feature of "Compare with your Calendar" is very useful. Being able to see just the available (green) days for multiple calendars would be even better. A shoot (for me at least) usually involves at least 2 other parties (model and studio/venue) and it would be great to see at a glance when everyone has a green day.
I.e. it would be lovely if this worked:-
https://purpleport.com/portfolio-calendar-compare.asp?nick=thekilnstudio&nick=keswild
In terms of the interface, it might work best as a button on your own calendar to overlay free/busy from additional calendars.