Alright @clivepaterson I think that I was able to fix the underlying issues with diag and the path function.

Ha yeah there also was a little bit of scope creep with some changes to the visual debugger to make it easier to verify some of the changes.

Also sorry on the broker build had messed up the rebase and didn't notice

So I was away for a while on a holiday, but I've tested this branch a bit.
I'm finding some unusual maps with the 1 v 1 mapgen and 3 v 3 mapgens.
Which use POINT_2 and POINT4:

Seed: 3459604215728096219
Spawns: 2
Map Size: 256
Num Teams: 2
Terrain Symmetry: POINT2

Style: DROP_PLATEAU
TerrainGenerator: DropPlateauTerrainGenerator
TextureGenerator: StonesTextureGenerator
ResourceGenerator: BasicResourceGenerator
PropGenerator: SmallBattlePropGenerator
DecalGenerator: BasicDecalGenerator
Resource Density: 0.74110866
Reclaim Density: 0.17715949
neroxis_map_generator_snapshot_gabpxncv5lb5w_aicaeaa

Seed: -391007914657171241
Spawns: 6
Map Size: 256
Num Teams: 2
Terrain Symmetry: POINT4

Style: LITTLE_MOUNTAIN
TerrainGenerator: LittleMountainTerrainGenerator
TextureGenerator: MarsTextureGenerator
ResourceGenerator: BasicResourceGenerator
PropGenerator: RockFieldPropGenerator
DecalGenerator: BasicDecalGenerator
Resource Density: 0.59021324
Reclaim Density: 0.7999777
neroxis_map_generator_snapshot_7kjnyx4opy4no_aycaeaq

I haven't dig into it much. but something happening with the perfect symmentry maps I think.

Interesting it looks like an angle for maybe the terrain symmetry is off. Can you add the map names here as copyable text?

Interesting it looks like an angle for maybe the terrain symmetry is off. Can you add the map names here as copyable text?

Yep I have updated the comment with the meta data and name. This one is also a small one, also looks good for testing:
neroxis_map_generator_snapshot_as44vgj4r6wba_aicaefa

I'm guessing it's prolly a small fix somewhere in the SymmetryUtil functions maybe, or one layer having issues, not sure.