EPS/AI assets might have transparert background which is not being preserved when converting to formats supporting transparency (e.g. PNG format).
Asset Bank uses Ghostscript (via ImageMagick) to convert EPS and AI images to different formats. By default Ghostscript converts them using a "device" which does not support alpha channel on conversion.
Amend ImageMagick configuration on the Asset Bank server in order to make GhostScript convert using a "device" that supports alpha channel.
First locate the path of the delegates.xml file for your ImageMagick installation.
The file can be found inside the ImageMagick installation folder, i.e.:
Run the following and look for the CONFIGURE_PATH path in the first lines of the resulting output:
$ convert -list configure
This will give you the directory that contains delegates.xml. eg:
Edit delegates.xml with your favourite editor and locate the following line: