How To Add Optifine To Forge. If you REALLY want to run minecraft in this configuration, add the flag -Dfml.ignoreInvalidMinecraftCertificates=true to the 'JVM settings' in your launcher profile. Forge is a mod-loader, where as Optifine is a mod.
Once you have done these steps open your Minecraft with the forge profile again, it should open with optifine installed. There's a big difference between Forge & Optifine. I really want the Status Effect mod but I want Optifine aswell.
If you REALLY want to run minecraft in this configuration, add the flag -Dfml.ignoreInvalidMinecraftCertificates=true to the 'JVM settings' in your launcher profile.
One of the mods I'd like to install onto my server requires optifine to function, but I'm unsure if I'd be able to or if there are any other ways I could do this.
It is intended to be used this way with Forge. When you install these mods individually, they create their. If you did everything right you should now have OptiFine in your FTB.