Hola!
I am looking for a way to display a pinterest-ish style grid layout with three columns, however cannot find any solution, which doesn’t include setting a number per column - I am very sure this needs to be possible without setting this static number.
General outline I have so far:
Outer Repeating Group (Searching for data) - 1x1 (row x column)
---- Inner Repeating Group (Getting Data from Outer RG) - 1x3
------- Display in Group
So basically I am looking for filtering every items per RG.
However: How do I filter? 
Thanks a lot for helping out!