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Slide GetThumbnail saves Bitmap without 3D chart

I am trying to save a 3D chart slide to an image, but I get an image without a chart.
It is screen from pptx:
image.png (16.1 KB)
It is result jpg file:
image.png (6.4 KB)
It is my code for saving:

Bitmap bmp = sld.GetThumbnail(5f, 5f);
bmp.Save(filePath, System.Drawing.Imaging.ImageFormat.Jpeg);

I am currently using Aspose.Slides.NET v 20.7.0.


Welcome to our community! Thank you for the issue description. Could you please share a presentation file or code snippet that generates the chart for our investigation?

checking diagrams (34.8 KB)

Thank you for the presentation sample. I reproduced the problem and got the same results. I have logged the issue in our tracking system with ID SLIDESNET-42456 for further investigation. You will be notified when it is fixed.