So I tried adding a different image to the first slide, one as a jpg, and the other as a png. Put it in the images folder with all the rest. Coded the name into the simple.html file but the new png or jpg will show up but all the other originals do. Do I need to rename it to slide-tele-?
The image size may not be exact as the original first photo. But I should see somthing even if distorted.
Nice you figured it out, but would you mind marking this post as solve. And if you would like post what you figured out in case someone with the same problem as you finds this post, it could be very useful to other people.