Okay Here's a big question for Marcel/Rudiger.

Considering quite a few of us are having FPS issues, how possible is it for us to Edit the Main Berlin Map and remove many un-needed features ( such as the full depot's ) and tree's, thus reducing the amount of polies to load on each tile ( which would significantly increase FPS )

Or does Marcel and Rudiger plan to create a low poly version of the Berlin Map for those on weaker systems ( I'm on a quad core Phenom II CPU with 4GB Ram and an ATI HD 5770 and still Lag on Berlin )

doing this would no doubt benefit your sales of OMSI and would help those of us who have paid get better performance out of OMSI.

I found out if you start OMSI and use the load route with no buses option, then select the main route. The FPS will be hovering around 60 FPS, average around 25-35FPS when driving around. Even when you put a new bus on the route with your starting location being at Depot. The FPS around the depot using the, "load route with no buses option" are actually pretty desirable. It is only when you use the depot parade option is when FPS goes to hell!

"low poly" is not everything! Did you reduced everything to "minimum" yet?

I have quite exactly the same PC as you have: AMD Phenom 965@3.4 Ghz, ATI HD5770, 8 GB RAM, Win7 Professional 64, 1920*1200.
And I'm getting between 20 and 35 FPS in Spandau with the "PC from 2009" setting. So I have no idea what's wrong with your system, it should perform well, even on higher settings.

EDIT: On minimum settings, I get 43 FPS sitting in a bus at Rathaus Spandau.

The short FPS drops while loading new objects and textures are normal. They can be reduced by turning "low res textures in high distances" OFF (but only if your video card has enough memory, which, in your case, it has).

Neighbour tiles count means how many tiles (size 300m*300m) are visible in every direction. If the slider is set to 1, then only the 8 tiles surrounding your current tile are displayed. When it's set to 2, then there will be 24 tiles visible plus your current tile. So more than setting "3" on this slider is not useful in a city area, for you won't be able to look that far and the number of tiles rises exponentially.