Hi Aspose. I have an issue getting thumbnail of shape with gradient color. I’m using Aspose Slides version 19.4 for .Net. The .Net project with a sample presentation you can find here
I have worked with the presentation file shared and have been able to observe the issue specified. An issue with ID SLIDESNET-41107 has been created in our issue tracking system to investigate and resolve the issue. This thread has been linked with the issue so that you may be notified once the issue will be fixed.
The issues you have found earlier (filed as SLIDESNET-41107) have been fixed in this update.