Why do trigger colliders hide light flares ?

Unity Engine
1

Hello,

I noticed that in my current Unity project, the flares of some point lights where no longer visible - most of the time. They reappeared when I deactivated some trigger colliders I had added for level design reasons.
So I made a simple test: A scene with only a camera, two point lights with flares and one trigger collider:

As you can see, the light covered by the trigger collider has no flare, the other one has one.
Hence, trigger colliders hide light flares.

The question is, is this a bug or a feature ?

Personally I am used to put trigger colliders where the player is moving around, not hidden in some obstacles! So it appears logical to me that a trigger collider should only do what it’s name says: Trigger stuff - not hide flares or anything else. So I consider it a bug. (But perhaps there is some hidden logic behind this…?)

2

It’s not a bug; colliders block raycasts. So put it on the TransparentFX layer.

–Eric

3

it is both :wink:
Light Flare will go through TransparentFX layer only. But in 3.0 you can have all layers you want :wink:

4

also, if a collider is trigger or not has no impact on it colliding, it only impacts the collision response (solid vs pass through)

5

Oh, yes, putting it on the TransparentFX layer works. Didn’t know that. Thanks !