Noise & Fire Flies Everywhere

I am New User of Blender I want to create a room with light rays but i am getting a lot of noise
Picture and Blender file Attached.

Picture Link.


Room.blend (688 KB)

Add more samples and/or use a denoise feature.

This type of scene is very difficult for cycles. My suggestions would be:

  1. Light the scene using an environment map - then add a portal in the window (see tutorial below)
  2. Make your volume scatter cube smaller and reduce the scattering amount. Currently it’s larger than the room - but given your camera is inside the room - anything outside is not really visible and all it is doing is reducing the amount of light available to your scene.