Minecraft Forge 1.8 - Loading Block Textures

Texturing is very different in 1.8. Here are some tutorials:

Updating Blocks;
Updating Items.

For both of the above:

• Remove any GameRegistry.registerBlock from the main mod class. These should now be in the block/item's constructor.
• Add a private final name field and create a getter for it.

For blocks:

• In src/main/resources/assets/{MODID}/models/block you will need 2 JSON files.
  The first should be called {BLOCKNAME}.json and contain this:

  {
      "parent": "block/cube_all",
      "textures": {
          "all": "{MODID}:blocks/{BLOCKNAME}"
      }
  }
  

  The second has the same name, goes in src/main/resources/assets/{MODID}/models/item, and has this code:

  {
      "parent": "{MODID}:block/{BLOCKNAME}",
      "display": {
          "thirdperson": {
              "rotation": [ 10, -45, 170 ],
              "translation": [ 0, 1.5, -2.75 ],
              "scale": [ 0.375, 0.375, 0.375 ]
          }
      }
  }
  

• Now in src/main/resources/assets/{MODID}/blockstates, you need 1 more JSON file. With the same name, it should hold this code:

  {
      "variants": {
          "normal": { "model": "{MODID}:{BLOCKNAME}" }
      }
  }
  

You should replace {MODID} and {BLOCKNAME} with your mod's ID and block's name, respectively.