Description

Multi Line Trace by Channel includes Actors with Overlap collision in the Out Hits array (but does not indicate a True Return Value). The two returns match with Ignore and Block collision settings. A similar setup with a Single Line Trace does not have this result.

Reproduced in 4.7.5 binary and Main (//depot/UE4/Promotable-CL-2507843)

Steps to Reproduce

1. Open any project
2. Drop a Static Mesh Actor with collision into the level
3. Set the Collision Settings to Custom with Visibility set to Overlap
4. Set up a Multi Line Trace by Channel:
[Image Removed]
5. Aim the Line Trace at the Static Mesh Actor
6. PIE

Result:
The Return Value returns False, but the Out Hits array includes the hit Actor. The two results match with Ignore (0; NO HIT) and Block (1; HIT). A similar setup with a Single Line Trace does not have this result.

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By Design
ComponentUE - Gameplay
Affects Versions4.7.54.8
CreatedApr 13, 2015
ResolvedApr 16, 2015
UpdatedJul 14, 2021