This issue is a workaround for the original problem reported with issue 75867,
which cannot be fixed completely so far.

Create a 3D chart in writer, calc or draw while having a page zoom other than
100%. After leaving the edit mode the created metafile looks less good as the
chart in edit view does because the resolution of the created bitmap (for the 3D
scene in the metafile) does not fit the screen resolution.

As a workaround replacements for charts are now generated fitting to the last
known parent zoom factor.

This means in detail:
When creating a chart and leaving the edit mode, the replacement in that moment
should look almost the same as the edit view (there are often 1 pixel difference
here and there but thats another bug). 

Remaining problems which are not addressed with this workaround and need to be
fixed with the original issue:
-When the zoom factor of the document is changed afterwards, the replacement
will look ugly again.
-When the replacement imgage is created from a chart that was not in edit mode
before, the image is optimized for zoomfactor 100% and not for the real
zoomfactor. This might happen when a document does not contain replacement
images and they are created during loading for example.
-No changes for impress at all. For charts in impress the replacement images are
always created optimized for zoomfactor 100% as they are needed in this way for
the presentation mode. So in impress edit mode 3D charts will still look almost
always ugly.