Example of Using Parallel Effect (and markers) in Storyline

What you need:

• Slider 1: picture in the background (city and sky)
• Slider 2: picture in the front (houses)
• Slider 3: dragging the “day”

Slider 1 and Slider 2 are controlled by Slider 3. Slider 1 moves slower (range is bigger) than Slider 2. That creates the parallel effect. Use a fade-in, fade-out extra object to simulate darkness when Slider 3 approaches the end. Done.

Here’s more unparalleled parallels:

https://community.articulate.com/articles/using-sliders-to-create-parallax-effects