Developer Notes

Use sorting of navigation modifiers.
To enable it, check Project Settings > Engine: Navigation Mesh > Sort Navigation Areas by Cost


When working with Nav Modifiers in a level that contains objects that have a custom Nav Area class, the prioritization of the modifiers is not consistent.

If you notice in the attached project, some of the objects are affecting the yellow area of the Nav Mesh, while others are not, and this priority changes intermittently.

The thread contains images of the desired setup and the actual result.

Found in 4.14.0 CL# 3195953. Reproduced in Dev-Framework CL# 3221683 and 4.13.2 CL# 3172292

Steps to Reproduce
  1. Open the attached project
  2. Simulate
  3. Open the console and type 'show navigation' without the quotes

Result: Notice that the objects containing different nav area classes are not always affecting the yellow modified area of the nav mesh.

Expected: The objects with the other area classes would be prioritized over the yellow modified area, or there would be a setting to determine prioritization.

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By Design
ComponentUE - AI
Affects Versions4.134.144.15
CreatedDec 12, 2016
ResolvedDec 12, 2016
UpdatedApr 27, 2018
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