[MapProxy] transparent layers get an opaque background after merging

[Tobias Wendorff]

I've created a testcase using my data and PIL. They get merged with
transparent background. So it seems to be an issue of MapProxy.

I'll try to use the code from MapProxy and write a bug report or patch.


Am 13.10.2020 um 19:26 schrieb Tobias Wendorff:
> My Pillow is at version 6.2.2 (last version for Python2). MapProxy and
> all its dependencies and system libraries are up to date.