About Celtic HD Photo Realism Resource Pack
Celtic HD Photo Realism Resource Pack is compatible with Sonic Ether’s Unbelievable Shader mod. This texture pack is compatible with iChun’s Portal Gun Mod!
How to install Celtic HD Photo Realism Resource Pack for Minecraft
In order to use HD resource packs properly (32× and higher) you will need to either patch your Minecraft using MCPatcher or using OptiFine. Optifine is preferred as it includes all of the features of MCPatcher, and greatly increases game speeds and graphics settings. MCPatcher tends to be updated on the same day as Minecraft updates, so use it instead if you are in a hurry.
Download links for Celtic HD Photo Realism Resource Pack for Minecraft
For 1.8, 1.7