I never exported a JPEG for production purposes from inDesign. Always did this with PhotoShop by rendering imported PDFs out of PhotoShop.
For my work with PowerPoint I *always* render and save PDFs exported from InDesign in PhotoShop to the file format PNG with transparency.
Btw.: I always open a PDF as SmartObject in PhotoShop so that I can render it in multiple resolutions depending from the resolution I set up in PhotoShop.
It still greys out the image even if it is exported as a PNG via InDesign. I am still not able to place it directly
...an image from In design...
...as a background in PPT...
...a number of background photos...
Why/how are these "background photos" in InDesign to begin with?
Why wouldn't you just import the image to PowerPoint instead of InDesign?
I did not suggest to export PNG from InDesign.
Never would. Just from PhotoShop like I described in my reply above.
Export a PDF, open it as SmartObject in PhotoShop, adjust the overall resolution of your PSD file as you wish, then export from PhotoShop with its "Save to Web…" functionality with 24Bit PNG with transparency.
Just curious, what version of Indesign and PP are you using? I did a quick test (on Windows) with ID CC 2015 and PP 2013 and it works.
Thanks for testing, Ellis.
Now I suppose that something is wrong with the used InDesign file…
Not with the app itself.
We just use indesign to lay out the text and image, just easier to set it up as a series. We are able to do it on a PC with no issues, seems to be an MAC issue.