This meta bug is focused on bugs related to object/shape fill problems during import and export.
I have added bug 48392. The root cause of a lot of fill problems in the filters is the fact, that the needed svg gradients are not implemented although they are part of ODF.
(In reply to Regina Henschel from comment #1)
> I have added bug 48392. The root cause of a lot of fill problems in the
> filters is the fact, that the needed svg gradients are not implemented
> although they are part of ODF.
This bug is not OOXML related, its ODF related, so not suitable for this meta bug.
The gradients in OOXML have multi-stops. Such cannot be represented with the draw:gradient elements, but can be represented without problems by the svg:linearGradient or svg:radialGradient elements. After this elements are implemented in LO, the gradients from OOXML can be translated to ODF nearly 1:1. Therefore I think OOXML filter depends on the implementation of the svg gradients. Currently multi-stop gradients in OOXML-files are rendered wrongly.