Allocate to your Minecraft launcher (4GB is usually plenty). Turn off Mipmap Levels in Video Settings. Ensure Fast Render is enabled if using OptiFine. If you'd like, I can help you:
Drag the 4Inferno_128x.zip file into the folder that opens. 4Inferno_128x.zip
Often includes realistic celestial bodies, custom clouds, and dramatic sunsets to enhance immersion. Allocate to your Minecraft launcher (4GB is usually plenty)
Open Minecraft and navigate to Options > Resource Packs > Open Pack Folder . 4Inferno_128x.zip