I know how to create a parallax scroll effect on a static image, but would it be possible to get the same effect on a slideshow? if I select the slideshow image, the motion tab next to ‘Fill’ is faded out for me, but if I use the one on the side panel it gives strange results (like the slideshow appearing fixed to the centre of the screen). Any ideas?
I'm not sure what you mean exactly. A Parallax layout is where content sort of slides over various background images while users scroll down the page. See example below.
Do you have a URL to a site which contains what you're tying to achieeve?
Sorry, a better way to describe it is a scrolling window effect, as shown in this tutorial:
I would like to know if there's a way to achieve this with a slideshow widget or something similar.
I don't understand because this video is already a tutorial for making it in old Adobe Muse and Photoshop so the answer is yes
make a new Fixed width site not a fluid one
you can have a single background image then all your slideshow images scroll over that?
I agree a url for the design will help a lot