Description

The foliage instanced mesh, as well as ISM and HISM components both appears to be unable to export navmesh data for generation once we introduce a change in the contents. This error only shows up in a packaged game,

This was reported and tested in 4.22.2 (CL-6574378) and reproduced in 4.23 (CL-6836100)

Steps to Reproduce

You will need a Source Build of the Engine for this issue

  1. Download and open the attached project in a Source Build
  2. Setup a custom Project Launcher profile based off the attached screenshot
  3. Launch the Custom Profile
  4. Open the project in Windows Explorer and run "start_server_client.bat"
  5. Press any key when prompted

Results: Once you introduce a change (eg Update Transform) in the instanced mesh tree the navmesh will ignore the instanced meshes, so the AI will not be able to navigate properly in these areas.

Expected: The navmesh will be properly regenerated around the ISM (foliage) exactly as it is happening in the Editor.

Have Comments or More Details?

There's no existing public thread on this issue, so head over toAnswerHub just mention UE-75841 in the post.

5
Login to Vote

Unresolved
ComponentGameplay - AI
Affects Versions4.234.22.2
Target Fix4.24
CreatedJun 6, 2019
UpdatedJun 19, 2019