This pack is not intended for normal survival. MCPatcher or Optifine needed.
Just noticed animated paintings and custom skys don’t work in Optifine.
How to Install BladeCraft Resource Pack for Minecraft
In order to use HD texture 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.