Flashlight on Mobile Device or Fake Flashlight

You can try projecting onto the world using “World Position Behind Translucency”. You should be able to replace the “WorldPosition” node in that thread with WorldPositionBehindTranslucency. Note it won’t be shadowed.

https://forums.unrealengine.com/showthread.php?122791-Where-to-start-to-achieve-this-effect&p=594057&viewfull=1#post594057