Rendering freezes when leaving Transition Map to Destination Map

Supposed the one reading this post already knows ServerTravel and Transition Map.

Right before leaving Transition Map, the rendering would freeze for about 1 second, then I’m in the Destination map.

My question is, can I avoid the freeze? Maybe an event for me to do a fade out before rendering go freeze, or rendering itself could turn the screen to black, etc.

Thanks.