Steps to enable shaders:
DL the optifine mod jar, the latest one for version 1.16.5. 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 overwolf ftb app, you can open this by clicking on the thumbnail -> 'settings' at the end of the row that 'play' is on -> open folder at the bottom.
Exit minecraft if you have it open.
copy / move the optifine jar into the
modsfolder opened in step 2.
go back to parent folder ->
configfolder -> open file called
in it we have to move the
skyRenderingConstellations, so that in the end you have