bar chart rendition style in wiki?

[Fred Fredson]

i have followed the instructions at: https://confluence.atlassian.com/doc/chart-macro-163415075.html
or rather this one: https://confluence.atlassian.com/doc/wiki-markup-examples-for-chart-macro-294486584.html

and the resulting graph looks as:

question:
is there any way to avoid the white lines in the rendition of the individual bars?
and i would also like to get rid of the drop shadow.

PS:
actually i'm using stacked bars. and this is what it currently looks like for me:

this is my wiki markup:

{chart:title=My Chart|subTitle=My Sub-Title|
stacked=true|type=bar|dataOrientation=vertical|
columns=Date,CAT1,CAT2,CAT3|
colors=green,red,yellow|
3D=false|categoryLabelPosition=down45|width=750} 
{csv:url=http://myserver.mydomain.local/data1/chartdata.csv|output=wiki|delimiter=;} 
{chart}

[Katerina Kovriga {Stiltsoft}]

Hi @Fred Fredson ,

Maybe it happens so that you use our Table Filter and Charts for Confluence app? You may browse, for example, for the Table Filter macro in the macrobrowser.

Then you may use the Chart from Table macro instead of the standard Chart macro - our macro is more flexible and customizable (regarding colors as well).

[Fred Fredson]

sorry.
add-ons from the "marketplace" or no option to me.

i'm seeking for a solution that's working out-of-the-box.
everything good so far.
it's just the "rendition style" our end users are not happy with ...