# Narrative Design: Collision Detection issue

**URL:** <https://forum.convai.com/t/narrative-design-collision-detection-issue/4934>\
**Category:** Unity SDK\
**Tags:** question, unity\
**Created:** [August 18, 2025, 5:25pm UTC](https://forum.convai.com/t/narrative-design-collision-detection-issue/4934 "2025-08-18T17:25:31Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ezewudokositoni](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/ezewudokositoni/32/4793_2.png) [@ezewudokositoni](https://forum.convai.com/u/ezewudokositoni)\
**Post date:** [August 18, 2025, 5:25pm UTC](https://forum.convai.com/t/narrative-design-collision-detection-issue/4934/1 "2025-08-18T17:25:31Z")

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Hi!

I have an inquiry to make regarding the player-gameobject/trigger collision setup. I am trying to interact with the NPC in my V.R Unity environment and folowing the recommended video, I used a cube as a trigger. Based on my narrative design, the NPC is supposed to speak once I collide with the trigger but it does not.

I suspect that the trigger box is not detecting my V.R Player. I have tried tagging my V.R player as “Player” and made sure all other pre-req’s are satisfied but still not sure what I am missing. Any help will be much appreciated. Thanks.

This is my current setup:

 ![image](https://canada1.discourse-cdn.com/flex004/uploads/convai/original/2X/3/369d2a33d45048a52eedd581238b03d363579ad9.png)

 ![image](https://canada1.discourse-cdn.com/flex004/uploads/convai/original/2X/5/523129de7807800af2702270e94c6a8b7150912b.png)

 ![image](https://canada1.discourse-cdn.com/flex004/uploads/convai/original/2X/0/0464bec0c7379bc8c8a36134c1c18f6e2fa6da8f.png)

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<div class="post-metadata">

**Author:** ![lizzicorleo](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/lizzicorleo/32/5362_2.png) [@lizzicorleo](https://forum.convai.com/u/lizzicorleo)\
**Post date:** [August 19, 2025, 7:04am UTC](https://forum.convai.com/t/narrative-design-collision-detection-issue/4934/2 "2025-08-19T07:04:29Z")

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hello, sorry to jump in…! Try adding a Rigidbody to the player. You can set it to Kinematic so it won’t be affected by physics. In Unity, triggers usually only work if at least one of the two objects has a Rigidbody. ☺

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<div class="post-metadata">

**Author:** ![ezewudokositoni](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/ezewudokositoni/32/4793_2.png) [@ezewudokositoni](https://forum.convai.com/u/ezewudokositoni)\
**Post date:** [August 19, 2025, 5:04pm UTC](https://forum.convai.com/t/narrative-design-collision-detection-issue/4934/3 "2025-08-19T17:04:04Z")

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No worries at all! Your input is much appreciated! That fixed the issue!