I got the base64 background image in the viewer style sheet working, but have run into a couple of issues.
calibre 3.99.7 portable
Windows 10
Epub
Issue 1: In paged mode (2 pages per screen) the background image only shows on the first 2 pages of a chapter or put another way the first 2 pages when a new html file from the epub is loaded. In flow mode this isn't an issue.
Issue 2: When I set the margins in viewer preferences instead of just setting the margin of the text it also shrinks the background image. Previously this wasn't the case.
Here is my style sheet. I have used this for years in the previous version. Any assistance would be appreciated.