Hey there thanks for reading this,
This is a little tricky and not sure if it is even possible.
OK I have BG image of a very rough looking piece of wood as a BG behind my main expanding content frame but……it cant be stretched or repeated cause its a photo of a piece of wood.
So what I did was sliced the photo of the wood into 3 graphic:
Top (faded the bottom so it would look smooth when overlayed)
Middle (could be repeated if needed)
Bottom (faded the top so it would look smooth when overlayed)
Ok I have the top slice in place as a BG behind the top part of the main content frame (works good)
I have the bottom slice in place behind the bottom of the main content frame (works good)
So now here is my issue, when the content frame expands there is a gap where I need the middle slice to repeat so it will fill from the bottom of the top slice to the top of the bottoms slice and repeat as necessary depending on how much gap there is. Im not sure how to do this.
here in the above website I had designed the BG image as per the same thing what your requiring.
I used three images for BG.
One for top with a fixed height with no repeat.
Second is for content purpose which gone repeat and expands with respect the content filling.
And Third for bottom purpose same as top image.
Well kered45, let me have your actual BG image I can produce it as you wan.