What's going on Rune-Server,

So... I have a problem and I need some assistance trying to fix it. I had [Resizable/FullScreen] added to my client which was done about 2 years ago and I never noticed the problem to much until a month ago when I was rebuilding my source. I can't seem to pin point the problem exactly but any assistance would be helpful.

Here is a preview of me standing in Edge near a hill with Resized Client:
Attached image

Here is a preview of that same location in Edge while in Fixed Screen view:
Attached image

I'm going to take a guess a method was missed when he added it but I'm quite unsure due to he added Fog and Particles the same time.