Examples of different MDF Thickness

As mentioned in the materials post, I have switched from using Home Depot 1 / 4" thick MDF to 1 / 8" thick MDF. 

The below section was built with  1 / 8" MDF:

This section was build with 1 / 4" MDF:

Not a gigantic difference, but the 1 / 8" is a little less beefy. I haven't noticed a significant lack of strength with the 1 / 8" structure.