# Unreal API thread safety **URL:** \ **Category:** C++\ **Tags:** unreal-engine\ **Created:** [June 30, 2015, 7:43pm UTC](https://forums.unrealengine.com/t/unreal-api-thread-safety/33950 "2015-06-30T19:43:21Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![Jambax](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jambax/32/904177_2.png) [@Jambax](https://forums.unrealengine.com/u/Jambax)\ **Post date:** [July 2, 2015, 7:40am UTC](https://forums.unrealengine.com/t/unreal-api-thread-safety/33950/3 "2015-07-02T07:40:39Z")
I know very little about this, other than I’m fairly certain that any collision-based items such as traces have to be done as part of the Game Thread. Somebody like Rama, CMartel or JamesG would know better though, I’ve honestly not used Multi-Threading in UE4 yet. There are a couple of tutorials from Rama here on Multi-Threading though just in case you haven’t seen them yet: > **[A new, community-hosted Unreal Engine Wiki](https://forums.unrealengine.com/t/a-new-community-hosted-unreal-engine-wiki/141494)** > > After over a year in maintenance mode, the official Unreal Engine Wiki is now permanently offline. These resources now live on a new community-run Unreal Engine Community Wiki — ue4community.wiki! You will be able to find content from the official... > **[A new, community-hosted Unreal Engine Wiki](https://forums.unrealengine.com/t/a-new-community-hosted-unreal-engine-wiki/141494)** > > After over a year in maintenance mode, the official Unreal Engine Wiki is now permanently offline. These resources now live on a new community-run Unreal Engine Community Wiki — ue4community.wiki! You will be able to find content from the official... --- _[View the full topic](https://forums.unrealengine.com/t/unreal-api-thread-safety/33950)._