As the topic saying.
My use case is this.
I have a sniper in VR game.
To implement sniper zoom scope, I need to have another camera render into sniper rifle’s scope.
Cannot use VR’s camera, because field of view is limit by the headset.
But if I enable shadow or post processing while sniper rifle’s scope is enable, FPS drop a lot.
So, I ask here. In case, someone has encountered similar problem before.
I somewhat have a feeling that I need to modify engine source code.