How to take a screenshot with motion blur while playing?

Hi,I’m trying to stimulate a real world camera,which can be used to take photos in game. So I want to take screenshots with motion blur when the shutter speed is slow.

I have tried to excute the command “HighResShot 1” in game,but the picture I got had no motion blur effect.

I also tried Scene Capture 2D. First I draw the texture then deactivate the Scene Capture 2D component. This worked for all post progress settings except the motion blur(the show motion blur flag and capture every frame are set to be true).

Is there any way to take a screenshot with motion blur while playing? Thanks for the help.