Compatible with optifine, little to no fps drop, no need for intensive shaders.
- Download and install Optifine HD
- Download Motion Blur Mod
- Unzip the contents of the zip to a new folder
- Use an unarchiver (For example 7Zip or Winzip) to open up your minecraft.jar in your .minecraft folder
- Copy the unzipped mod files into your minecraft.jar
- Delete the META-INF folder in your minecraft.jar