# Linetrace hits something invisible only when looking at an angle, how do I fix this? **URL:** \ **Category:** Community & Industry Discussion\ **Tags:** linetrace, invisible, unreal-engine, hit, projectile, question\ **Created:** [December 8, 2016, 7:46pm UTC](https://forums.unrealengine.com/t/linetrace-hits-something-invisible-only-when-looking-at-an-angle-how-do-i-fix-this/378740 "2016-12-08T19:46:41Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Sno-dog](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Sno-dog](https://forums.unrealengine.com/u/Sno-dog)\ **Post date:** [December 8, 2016, 7:46pm UTC](https://forums.unrealengine.com/t/linetrace-hits-something-invisible-only-when-looking-at-an-angle-how-do-i-fix-this/378740/1 "2016-12-08T19:46:41Z")
I have a linetrace setup for a projectile. When I look at an angle to a hole in my floor, it hits an invisible wall at the edge of the hole. I don’t know why though, my bsp additive and subtractive brushes aren’t placed like that. I have no idea what it could be hitting, can someone please help me solve this issue? I’ve tried so many different things and googled this problem thoroughly. I don’t know what else to try. I have images of my blueprints and some debug images of the linetrace as well. ![117922-debug01.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/1/1/b/11b0b7429ad7c45938923fc650399de177efbf6f.png) ![117923-degub02.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/8/8/c/88c648c0cce977cc2958ab4bb0d8aa326a1bf7b1.jpeg) ![117925-blueprint.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/5/5/a/55a9ce6299653397254128de37c6a2dd276ae782.png) Does anyone have any ideas, suggestions, or more context they would like me to provide? Thank you, Sno ---
**Author:** ![chackaloso](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@chackaloso](https://forums.unrealengine.com/u/chackaloso)\ **Post date:** [November 4, 2017, 11:42am UTC](https://forums.unrealengine.com/t/linetrace-hits-something-invisible-only-when-looking-at-an-angle-how-do-i-fix-this/378740/2 "2017-11-04T11:42:51Z")
Did you manage to figure it out? I have a similar issue with mine… ---
**Author:** ![PlainBane](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@PlainBane](https://forums.unrealengine.com/u/PlainBane)\ **Post date:** [November 4, 2017, 3:33pm UTC](https://forums.unrealengine.com/t/linetrace-hits-something-invisible-only-when-looking-at-an-angle-how-do-i-fix-this/378740/3 "2017-11-04T15:33:41Z")
Hi, Have you tried replacing brushes with static meshes? It could be that there is some collider that’s blocking visibility trace channel. Try changing trace channel in trace node to camera. Or it’s the brush you are using to cut that hole in the ground. It’s probably sticking out and blocking line trace. ---
**Author:** ![lumakker](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@lumakker](https://forums.unrealengine.com/u/lumakker)\ **Post date:** [November 8, 2017, 1:11pm UTC](https://forums.unrealengine.com/t/linetrace-hits-something-invisible-only-when-looking-at-an-angle-how-do-i-fix-this/378740/4 "2017-11-08T13:11:03Z")
Hey, I have the same problem. Any solutions in sight? ---
**Author:** ![ndelchen](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ndelchen](https://forums.unrealengine.com/u/ndelchen)\ **Post date:** [November 8, 2017, 1:29pm UTC](https://forums.unrealengine.com/t/linetrace-hits-something-invisible-only-when-looking-at-an-angle-how-do-i-fix-this/378740/5 "2017-11-08T13:29:32Z")
I guess there’s a collider blocking your trace. Try to print the name of the object that is hit, so you can identify it and check its collider. ---
**Author:** ![lumakker](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@lumakker](https://forums.unrealengine.com/u/lumakker)\ **Post date:** [November 8, 2017, 6:49pm UTC](https://forums.unrealengine.com/t/linetrace-hits-something-invisible-only-when-looking-at-an-angle-how-do-i-fix-this/378740/6 "2017-11-08T18:49:04Z")
Yes, I did that. In my project the hit component (visibility line trace) is the additive brush of the wall. The subtractive brush seems to have visually created a hole in the wall, but did not fully update the collision of the additive wall brush. geometry building did not help. replacing the subtractive brush did not help. (behaviour is inconsistent. some new subtractive brushes created true (collision) holes, others didnt.) replacing the additive wall brush apparently solved the problem. (not a true fix though)