OptiFabric Mod 1.17.1/1.16.5/1.15.2 – Minecraft Mods PC
How to: Install Optifine for Minecraft 1.15.2 FAST - YouTube
Optifine 1.19.3 Release Date and Updates Live, Free News
How to Install Optifine and Forge 1.14.4/1.15 : 6 Steps - Instructables
OptiFine on Twitter: "Any bugs or issues that would be found in this build, especially ones pertaining to shaders currently available now, are likely to not be fixed until the next preview
How To Download & Install Optifine in Minecraft 1.15.2 - YouTube