Perkcraft Is a non laggy texture pack best for medium quality computers. Comment, Download and support! :D
I updated and most of the blocks are less laggy but still high quality!

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Download from the Mirror! (Mediafire, Original)
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Additional Notes

Tips for making minecraft run faster!
1. Open the task manager, find the process, right click, and set priority to High (Not Realtime Or else it will crash)

2. Set the graphics to fast

3. Do not put on Advanced Open GL

4. Make it Max FPS

5. When ever it is laggy, just change the render.