I'm using the most current InDesign CC version (10.0.0.70 Build). I've built a file for ePub (fixed) export. I have Photoshop images placed over InDesign radial gradient backgrounds. The Photoshop images have (painted) drop shadows with transparency. When the ePub exporter creates the JPG or PNG files, the image drop shadows have horrible horizontal black lines through them (see image below). Problem is, it’s also inconsistent, sometimes they’re not there, other times, the lines appear. It's not the just the iBooks preview either, as I've opened the image files in Photoshop and they are indeed there as pixel data.
I’ve tried simply exporting image files as a test. Doesn't matter if I export JPGs, PNGs or GIFs, they all give me the same issues. I've even tried just the Photoshop file on a plain white background, same issue. Does InDesign not like calculating transparency? I can't seem to find a way to make it work. I’ve even recreated the background gradient files as raster PSDs, thinking maybe InDesign isn’t liking it’s own gradients for compositing, but I still get the same issue.
Should I not be using InDesign to layout composited images on a page? Seems unfortunate, as it's a huge timesaver (and a big part of page layout). My work around so far has been to create each page of art as a separate Photoshop file, then place that into my layout. Not as smooth a workflow, as it’s extra time creating additional Photoshop artwork. Plus, it gives me more files to manage.
My end goal it to have an efficient ePub creation workflow, and I thought InDesign was going to provide that. But this problem with exporting images has me concerned. If this is a bug, I would LOVE to see it fixed, as I've been using InDesign for print design since v2.0 and would really like to extend my use of it into ePub creation. Am I missing something? Thank you in advance for any solutions offered.