Sometimes you may want to send a Rich Push with an In-App Message, but have a different image for each. You could use this method if you wanted to use a different image in an In-App Message than you wanted for the same message in your Message Stream.
Here's how you would set this up:
In the Push Notification setup, add a custom key/value named image_url, and the value being the url of the image you want used for the Rich Push. If your app is set up for Rich Push Notifications the image url will be picked up and used. Guidance on setting up Rich Push is in our documentation - for Android and iOS.
Add a different image to the In-App Message in the normal way.
Find our documentation here.