I am not a C++ guy, but you can do it blue print. If you are not using BPs I am going to be of little help to you. If you happen to have them in your project I may be able to help?
What are you trying to assign them to, you say “UI” but is that a button, an image? My assumption is that if you are doing an inventory system you have set an image within your widget?
My advice if this is the case, it to bind the brush which can be found under appearance. You can then set the image and then the brush. Take a look at the screen shots, see if they help you.
