Difference in prebaked and runtime baked NavMeshSurface.

Unity Engine
1

I have a terrain with a water plane.
The water plane has a NavMeshModifierVolume attached.

When baking the NavMeshSurface on the terrain in the editor it slices things nicely

3007482--224317--Screen Shot 2017-03-26 at 04.49.31.png
3007482--224317--Screen Shot 2017-03-26 at 04.49.31.png970×878 660 KB

but misses lots of spots when used at runtime.

3007482--224316--Screen Shot 2017-03-26 at 04.48.00.jpg
3007482--224316--Screen Shot 2017-03-26 at 04.48.00.jpg1002×938 195 KB

Is this intended functionality, is it a bug or is there something I’m missing?

2

My solution ended up being to append an offset to the sourcesBounds in the NavMeshSource.Bake function before baking so i could exclude everything beneath the water.