Created attachment 60723 [details]
pptx file with picture effects and screenshot
1 slide: picture with effect (something like fuzzy borders)
2 slide: screenshot of first slide made in PP 2007 on Windows 7
reproduced in 3.3.4 and 3.5.2 on Fedora 64 bit and Windows 7 32 bit
What is interesting: in Power Point picture shown without effect during of editing it. Effects appears only when we select another object. (spare CPU consuming)
Effect is reproducible with "LibreOffice 18.104.22.168 (RC2) German UI/Locale [Build-ID: 235ab8a-3802056-4a8fed3-2d66ea8-e241b80] on German WIN7 Home Premium (64bit).
I believe that the root of the problem is that DRAW does not support such an effect.
Do you agree with my suspect? That would mean we need an enhancement.
I agree. This bug depends from this enhancement.
Extended image manipulation is not in the major focus of LibreOffice Draw. The mentioned effect can be done easily with any external tool.
However, Impress (which would be the first to open Powerpoint documents, by the way) allows to apply a filter to an image (aging, charcoal, invert etc.) that could be made available in Draw (resp. for all modules) as well. And it's nothing to say against adding more options there.
Microsoft puts the focus on the visual style (that's how it is called there) meaning the presentation of the image. Effects are: Shadow, Reflection, Glow, Soft Edges, Bevel, 3-D Rotation. There are also "artistic effects" that correspond with Impress' image filters. Enough room for enhancements.
Setting component to Impress.