Which settings and packs need another look?

Player-facing checks from the September 29 notes
AreaWhat to check
Rendering With Improved Transparency, distant sky and clouds blend into terrain fog, softening the visible boundary
Debug interface F3 has a clearer redesigned layout; recheck tutorials that use older screenshots
Data packs Pack version 122.1
Resource packs Pack version 99.0

Source · www.minecraft.netOfficial Snapshot 2 change list

How do you install the test build?

  1. If you plan to bring an existing world, first keep a separate backup of its game files. The untouched backup and the working test copy must be different files.
  2. In the Minecraft Launcher, open Java Edition → Installations and enable snapshots.
  3. Select exactly 26.4 Snapshot 2 for your test installation. Choosing a later snapshot puts you outside the version covered here.
  4. Use a separate game folder and begin with a new test world. Do not replace your regular saves with files from the experiment.

Source · www.minecraft.netEditions and testing-version options

How should you compare the visuals?

Keep the viewing direction and settings comparable. Change one graphics option at a time and record resolution, render distance and active resource packs. This makes it easier to identify which setting accounts for the difference you see.

Does this build add ice caves?

Its published list does not include the new cave or frozen zombie additions. A reveal is not an installation instruction; the upcoming-features article below separates those announcements.

Related guides

Minecraft upcoming features: Ice caves and the frozen zombie

Minecraft The Sift: New dimension and Dungeons II differences