bpgisme wrote:Do you guys have any ideas or should I give up and go a different way? (In the meantime I'm going to keep searching online for an answer.)
The limitation (of some 14k vertices/faces, IIRC) is per object, so if reducing polygon count would make you lose too much detail, you can cut your landscape up into several smaller pieces -- then it will work fine.
As for easy reduction: Edit mode -> select all ("A" key [selects all, unless any are already selected, in which case all are de-selected) -> Mesh menu -> Scripts -> Poly reducer
If there are areas that you can only see from afar, it might be safe to reduce detail in those areas (maybe even completely remove bits facing away) and keep it high where the player is allowed to be. The script provides a way to protect parts of a mesh from the reduction process, by adding vertices to a vertex group, and giving its name to the script. The weight you assign to each handful of vertices, that you add to the group, decides how strongly the reduction will affect their area.
Vertex groups can be created and have vertices added to them, from Edit buttons -> Link and materials -- it's the button cluster to the left. Just make sure to delete the Vgroup afterwards - they will be valueable once we get skeleton animation, but at the moment they are not supported by the exporter and any export will halt if there are any in your project.