It makes netherrack transparent, allowing you to see quartz and lava easily.

Drag the downloaded Xray Ultimate 1.8.zip into the folder that opens.

Optifine provides the effect (or Brightness setting), which keeps everything bright while you are exploring the transparent world. This is the difference between struggling to see ores in a dark tunnel and easily identifying them from 50 blocks away. Important Usage Notes & Limitations

Download the Xray Ultimate zip file designed for Minecraft 1.8.9.

While 16x16, looking through thousands of blocks at once might cause slight lag on very low-end computers. If you'd like to know more, I can:

Xray Ultimate 1.8 -

It makes netherrack transparent, allowing you to see quartz and lava easily.

Drag the downloaded Xray Ultimate 1.8.zip into the folder that opens. xray ultimate 1.8

Download the Xray Ultimate zip file designed for Minecraft 1.8.9. It makes netherrack transparent

While 16x16, looking through thousands of blocks at once might cause slight lag on very low-end computers. If you'd like to know more, I can: