I recently discovered the first prerelease of Optifine 1.15.2. To download, you will need to: Go to https://optifine.net/downloads Click "Preview Versions" Download "OptiFine 1.15.2 HD U G1 pre1" Go through the installer and then it is installed! (You may be redirected to an adfocus site, just click the skip button) EDIT: Just as an FYI, Shaders do not work atm for prerelease 1. EDIT 2: This version of Optifine is VERY unstable. I have been experiencing problems with chunk loading and IMO I don't think it is worth it to use Optifine yet. EDIT 3: I know I have been doing a lot of edits but the textures may be glitchy. It would be reccomended to use a resource pack to prevent these glitches.