When using the Effect Material of RetainerBox, we cannot see the preview result frame by frame in the editor interface. However, the result can be seen during runtime in the game.
I would like to know how to make this rendering result visible in the UMG editor preview. I tried looking at the “OnPaint” section of SRetainerWidget.cpp but couldn’t find any relevant information.
How to modify the source code of RetainerBox to achieve the effect of previewing in the editor?