Open the test file. In Word it has a background image with brightness/contrast set. Opening in Writer, it is 100% 'solid' ( You can get the pictures context menu, using Navigator, clicking WordPictureWatermarkxxx, then F6, F6, ESC, Shift+F10 ... ) Will attaching the test docx file. And an image showing settings in Word.
Created attachment 132506 [details] docx file with background image, contrast&brightness set
Created attachment 132507 [details] screen shots of settings in Word
after saving and reopening in Writer, it is a 'normal' image, of which transparency can be set in the image toolbar.
Hi Cor, I think this is a duplicate of bug 85757. *** This bug has been marked as a duplicate of bug 85757 ***