Is it possible to save a default render target value?

I was wondering if its possible to save a default value for a render target. I created it from the content browser and the default values always show black (which means all things reading from it read black). In the content example with the fluid sim, there seems to be a default texture (the water ripples) but I cannot seem to figure out how to replicate that behavior.

2 observations:

-Starting the game does save the value for the remainder of that editor session
-The epic content example has an option to right click re-import but I cannot seem to do that on my own asset. Makes me think you can import a render target some how with default values?