We are using a third party to mark up a design that we had created in 99designs. An issue has come up over the number of image files. For each page there are 20 or 30 individual image files, mostly 1kb or less in size, corners, boxes etc. We're trying to understand why there are so many but the main issue we have is that we are being told that further image combining will have a negative impact on performance and that it is better to have individual image files rather than one large file. This goes against everything we have read about page load performance but it is not our area of expertise.. Does anyone have any experience on this to help guide us? Thanks.