Steps to enable shaders:
- DL the optifine mod jar, the latest one for version 1.12.2. https://optifine.net/downloads click on mirror if you want to avoid ads (or don't to support the author)
- Open the minecraft install folder. If you installed via twitch desktop app, you can open this by right clicking on "FTB revelations" and choosing open folder, or clicking on it and then cog wheel top right -> open folder.
- Exit minecraft if you have it open.
- copy / move the optifine jar into the
mods
folder opened in step 2. - go back to parent folder ->
config
folder -> open file calledastralsorcery.cfg
-> Search forweakSky
-> you'll see lines like this:
S:weakSkyRenders <
>