Adding materials/finishes to Walls
Look under the stock Assets that comes with Revit. There is one using a similar Image. You can assign it to a Material to be used by your Wall Finish.
...you can also use these Images in Revit in your Material's Appearance Asset.
Did you happen to see the Link I provided above?
...not sure where you are getting stuck. Are you unclear about how to navigate to the Asset Browser, or how to insert or change an Image?
