Feature Request: Add possibility for "mask clipping" and "invisible zeros" in summation mode

[TobiasRosskopf]

Like in "single mode" there could be the options for "clipping to a mask" and "make zeros invisible" in summation mode as well. Of course the use of a custom qml would be nice, too. ;-)

[Weathermann]

I think this expansion is now complete.
You are welcome to try it with the plugin from my branch
https://github.com/Weathermann/radolan2map/tree/same_settings_radolan_single_multi
(maybe download as Zip and integrate it offline into QGIS)

[Weathermann]

Another extension for easy setting of the date range: