how to render multiple things separately I'm using Blender 2.80. I have a scene, where I fire 20 cannons at the same time, with smoke and fire. How can I render (with Eevee render) some cannons separatley?

(i.stack.imgur.com/lXFuK.png)
This tutorial explains how to work with view/render layers
https://www.youtube.com/watch?v=jOO3K1B9vgg

View layers is to render separately.
render layers is how you combine them in compositing.