Huge FPS drop when facing certain direction

My FPS instantly drops when i look north (for example) and when i look the other way i have no lag at all.
Laptop specs:

i5 3rd gen @ 2,3 Ghz
8 GB RAM
GT540M

fps is a problem right now, its alpha, they’ll fix it im sure.

I had this issue but got fixed using the steam client.

Same Issue for me if i look to the big Mountain i get a HUGE FPS Drop.

In my case, the mountains don’t cause the problem, just the direction lol.

Many people are experiencing this fps drop,the only thing is to wait for a patch.We know that feel,well atleast i get lik efrom 60 to 25 when facing that direction.