Large amount of fences impact performance

Looking at a large amount of fences will cause your FPS to drop and GPU usage to stay high.

Steps to Reproduce:

1. Open the provided world MC_7895.zip
2. Look in a direction where the fences are not in view
3. Look at the fences are in view

Observed Behavior:
When you looking into the direction of the fences, your FPS will be lowered and your GPU usage will rise.

Expected Behavior:
Your FPS does not drop and GPU usage stays low.