A massive number of support threads on Reddit and Minecraft forums start with: "I extracted the OptiFine ZIP file and now I have a bunch of folders called 'net' and 'META-INF' – now what?"
If you are trying to use OptiFine on a server, note that OptiFine is a client-side mod . optifine zip file
: Make glass or stone blocks seamlessly connect by adding specific properties files within the optifine/ctm 2. Design Custom Entity Models (CEM) A massive number of support threads on Reddit
You cannot simply open the OptiFine zip file and expect it to work immediately. Minecraft requires the Java Runtime Environment to function. optifine zip file