Unity Issue Tracker - Raycasts hit the GameObjects that are in the Scene when used in the Prefab Mode

By Design

Votes

0

Found in

2018.3.0a6

2018.3.2f1

2019.1.0a1

2019.2.0a1

Issue ID

1120533

Regression

No

Raycasts hit the GameObjects that are in the Scene when used in the Prefab Mode

Scene Management

-

Jan 24, 2019

How to reproduce:
1. Open the "Main Scene" in the attached "PrefabCollisionBug.zip" project
2. Double click on the "Sample Prefab" in Prefabs folder to enter a Prefab Mode
3. Try to move the whole Prefab on the Y axis

Expected Behavior: Raycasts hit only to the objects that are in a Prefab Mode
Actual Behavior: Raycasts hit to the objects that are in the Scene rather than in Prefab Mode

Reproducible with: 2018.3.3f1, 2019.1.0b1, 2019.2.0a2

Note: Green Raycasts show Colliders while red ones show that it did not find a Collider. Could not test with 2017.4 because it does not have a Prefab Editor. The functionality seems to work partly on the 2018.3.0a6, but Scene GOs are not ignored either. (added a screenshot)

Resolution Note (2019.2.X):

With a new prefab system we also introduced a physic's world separation and this needs to be taken into account.
I've changed the script that draws collisions a little bit to be aware of this separation :)

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Comments (1)

angelonit

Jun 10, 2021 01:15

I made an editor script to "Put objects from a list on the ground" using Physics.RaycastAll and Found the Physics.Raycast/Physics.RaycastAll calls return null on the "Prefab Mode" while they do work if I put the prefab in the scene and use the script from there instead of in "Prefab Mode" (doing that and then hitting override to save the prefab changes was my workaround)

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