Blueprint Event Or Function that Triggers when level is done Rendering Materials

Guys is there a node or function anywhere that tells me when the level is done loading or rendering textures?

The reason for that is: When the player finishes a level i want to show a loading image and keep showing it until he is in the next map and textures are fully rendered.

What happens today is that i show the loading screen when finishes the level and as soon as the other level is loaded he is popped in. The problem is that no all textures are rendered and a few things are still being loaded. Is there such a thing? Or a viable workaroud without using random timers?