Am I the only person that's getting 5fps everywhere lagging so badly the bus is hopping about and I can't actually do anything? Even in places unchanged since v1.3 which I had silky smooth fps on. I've never experienced such lag in my life, even on Bad Kinzau I'm usually getting 25-40 fps, mostly 30-40. And my settings are on the "minimum" preset option, which I prefer because it's not low enough to bother me so much that I'm missing things and seeing the map load in front of the windscreen but get a bit better fps.
I'm now experiencing the same the same problems, even in maps that have run smoothly for some time, something is causing low frame rates and the jumping bus syndrome, which I have not had for some time. I have turned everything down so some scenery objects do not appear, and still I get problems.
So I have taken all addon maps, hof files, etc out of Omsi, and putting them back in one by one asnd then driving each one. So far I can confidently say the Newcastle, Scunthorpe, and Berlin maps are fine (three of my favourites), Great Grundorf still stutters a bit as it always did, the rest have yet to be put back in, however I think I know which download addon map is the problem. It would not be prudent to say at this stage which map I think is maybe causing the problem until I have put it back in and driven it; but before posting the result I will probably pm the developer first out of respect to his work and seek further guidance, unless I find it is one of the maps from the Omsi forums, then I may not bother and just delete the map completely.
I'm eagerly waiting for David's Durham map, and Mr Moose Scunthorpe V3 map.