I layered a gradient over a photo and masked it to create a fade. When I save the file as a PDF and place the file in an email the image doesn't show the fade. I've saved it every way I can think of as a high quality print, press quality, et. I've played around with the compatibility, checked and unchecked the options available. No change, the fade still, well, fades. Any ideas?
I also had a similar problem. I saved an AI file, which had a layering mask of a gradient over a photo, as a PDF to print. When I open the PDF with Acrobat Reader it opens okay, with the layering mask. But when I open the PDF with Chrome or Firefox, it doesn't show the gradient.
I couldn't find the problem within the PDF settings. The way I found to surpass this was to flatten the image with the clipping mask (not the best solution, but now the gradient appears the way it should no matter where I open the PDF file).