How do you make a ray tracing world in Minecraft?

How do you make a ray tracing world in Minecraft?
Quick instructions on creating a new RTX world

Play Beta.
Create New.
Create New World.
Click on Add Ons.
Click on Resource Packs.
Click on My Packs. You should see your newly downloaded RTX-capable pack here. Click on it. Click on Activate.
Make any other world settings changes you’d like.

Quick instructions on creating a new RTX world
  1. Play Beta.
  2. Create New.
  3. Create New World.
  4. Click on Add Ons.
  5. Click on Resource Packs.
  6. Click on My Packs. You should see your newly downloaded RTX-capable pack here. Click on it. Click on Activate.
  7. Make any other world settings changes you’d like.