# Line trace based on reflection (bounce) **URL:** \ **Category:** Rendering\ **Tags:** line-trace, reflection, bounce, unreal-engine, question\ **Created:** [January 18, 2015, 1:52pm UTC](https://forums.unrealengine.com/t/line-trace-based-on-reflection-bounce/304286 "2015-01-18T13:52:29Z")\ **Posts on this page:** 1\ **Showing post:** 18
**Author:** ![TJ\_V](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/tj_v/32/1008648_2.png) [@TJ\_V](https://forums.unrealengine.com/u/TJ_V)\ **Post date:** [January 29, 2015, 3:29pm UTC](https://forums.unrealengine.com/t/line-trace-based-on-reflection-bounce/304286/18 "2015-01-29T15:29:38Z")
The JIRA report came back as not being a bug. The developers said that the correct way to handle this setup is to use the first fix I posted above. You shouldn’t directly line trace off a a surface normal, you need to add that small offset to keep errors from happening. However, there still seems to be issues with older converted projects. I believe recreating them in 4.6 will fix the issue and upgrading from there works correctly (tested with our latest internal build). Here is a tutorial I posted with those changes. > **[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 — https://unrealcommunity.wiki/! You will be able to find content from... --- _[View the full topic](https://forums.unrealengine.com/t/line-trace-based-on-reflection-bounce/304286)._