chromium24 wrote:
That's actually caused by the morale and formations system, and it can be triggered in forests and mountains. Just turn it off. That said this game DOES cause RGL errors where once there were none, so something in this mod is rotten, but you can guess that from the sheer volume of people saying it's unplayable.
Actually that makes a LOT of sense. If RGL is R____ Graphics Library and "Unable to Lock Vertex Buffer" has to do with conflicts in describing graphical surfaces (ie, objects), then it would make sense that formations should cause a problem where the land isn't flat and so the program doesn't know whether to populate a vector with terraform or character.
There are other mods with heavy RGL Errors, though games like Europa Universalis also sees them from time to time.