Hi Andreas,
Thank you for posting your query to us.
Issue :
transparent color was replaced with black - is there a way to tell the converter engine to maintain the transparency of GIFsI am afraid that I was not able to reproduce the issue. Also I have created a simple sample to test this issue and it is available in the following link:
http://websamples.syncfusion.com/samples/PDF.Web/6.1.0.34/P39683/main.htm
Please have a look at the above sample .Could you please try reproducing it in the above sample and send us modified sample or html files to reproduce the issue so that we could sort out the cause of the issue and provide you a solution?
Regards,
Vishnu.