under the Experimental toggles in their world settings for the shader to function correctly. Comparison with Other Shaders
Note for Deferred Rendering: If this pack utilizes Minecraft 1.20's experimental graphics features, go to your specific world settings, scroll down to the tab, and toggle on Render Dragon Features or Deferred Technical Preview . Load your world and enjoy the high-quality transformation. Safe Downloading Practices file name climaxshadermcpe120mcpack high quality
If you want to fine-tune your performance, let me know your or RAM capacity so I can recommend the best video settings for this shader. Share public link under the Experimental toggles in their world settings