# \#trace-channels **URL:** https://forums.unrealengine.com/tag/trace-channels/1520.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [Assigning trace channels from a plugin](https://forums.unrealengine.com/t/assigning-trace-channels-from-a-plugin/306046)
**Author:** [@Voidstar](https://forums.unrealengine.com/u/Voidstar)\ **Replies:** 3\ **Last updated:** [March 22, 2026, 8:17am UTC](https://forums.unrealengine.com/t/assigning-trace-channels-from-a-plugin/306046 "2026-03-22T08:17:31Z")
I’m writing a custom plugin which requires use of its own trace channels. Currently the only way I can see to make this work is to require the user to create the needed trace channels manually within the editor project … --- ## [Profiling Gameplay Abilities vs Components in Unreal Insight](https://forums.unrealengine.com/t/profiling-gameplay-abilities-vs-components-in-unreal-insight/2667571)
**Author:** [@evethir](https://forums.unrealengine.com/u/evethir)\ **Replies:** 0\ **Last updated:** [October 22, 2025, 10:45am UTC](https://forums.unrealengine.com/t/profiling-gameplay-abilities-vs-components-in-unreal-insight/2667571 "2025-10-22T10:45:13Z")
Hello there! I’m playing a bit with GAS, and I’m trying to figure out if it’s worth implementing logic in a gameplay ability or in a Blueprint Component from the performance point of view. To do so, I am using Unreal I… --- ## [Hit result under cursor while dragging widgets](https://forums.unrealengine.com/t/hit-result-under-cursor-while-dragging-widgets/451561)
**Author:** [@BlackBird604](https://forums.unrealengine.com/u/BlackBird604)\ **Replies:** 4\ **Last updated:** [June 3, 2025, 11:53am UTC](https://forums.unrealengine.com/t/hit-result-under-cursor-while-dragging-widgets/451561 "2025-06-03T11:53:00Z")
Hello, I’ve created a simple draggable widget that creates a drag operation. The class of the DragVisual is different from the actual draggable widget. It consists only of an image. Both the DragVisual widget and its im… --- ## [Why are my trace and item channels not saved?](https://forums.unrealengine.com/t/why-are-my-trace-and-item-channels-not-saved/284127)
**Author:** [@jagoorv4](https://forums.unrealengine.com/u/jagoorv4)\ **Replies:** 19\ **Last updated:** [January 25, 2025, 4:58pm UTC](https://forums.unrealengine.com/t/why-are-my-trace-and-item-channels-not-saved/284127 "2025-01-25T16:58:02Z")
I’m not sure if this is a bug or I am doing something wrong (i.e. there is some special button I must click to save project settings, however UE4 saves my action and axis mappings just fine). I have created a new trace c… --- ## [Create a new Custom Trace Channel at runtime? (C++)](https://forums.unrealengine.com/t/create-a-new-custom-trace-channel-at-runtime-c/753463)
**Author:** [@Anti-Wisdom](https://forums.unrealengine.com/u/Anti-Wisdom)\ **Replies:** 3\ **Last updated:** [December 26, 2024, 12:34pm UTC](https://forums.unrealengine.com/t/create-a-new-custom-trace-channel-at-runtime-c/753463 "2024-12-26T12:34:48Z")
I know how to create custom Trace channels or object types using the Project settings, but I’m making a plugin and would like this process to become automated on startup of the game. I’ve seen very little information on… --- ## [Hit Result=True even when Visibilty=False](https://forums.unrealengine.com/t/hit-result-true-even-when-visibilty-false/2033790)
**Author:** [@Virtuality](https://forums.unrealengine.com/u/Virtuality)\ **Replies:** 14\ **Last updated:** [September 23, 2024, 9:13pm UTC](https://forums.unrealengine.com/t/hit-result-true-even-when-visibilty-false/2033790 "2024-09-23T21:13:33Z")
In Unreal Engine 5.4.3, I’m getting this strange behavior: Set a Static Mesh with “Visible=False” and/or “Hidden In Game=True” Do a “Get Hit Result Under Cursor By Channel” (with Trace Channel=Visibility) I get hit re… --- ## [What do i do to fix the issue](https://forums.unrealengine.com/t/what-do-i-do-to-fix-the-issue/1705041)
**Author:** [@x.mr.enigma.x](https://forums.unrealengine.com/u/x.mr.enigma.x)\ **Replies:** 0\ **Last updated:** [February 22, 2024, 2:22am UTC](https://forums.unrealengine.com/t/what-do-i-do-to-fix-the-issue/1705041 "2024-02-22T02:22:16Z")
Hi, quick notice. Im following the rpg series on ep 10 for the sword trace, im pretty new to Unreal engine (3 days in) But, i cant seem to get the notiestates on attack1 to work as intended. It only displays the traces … --- ## [Trace line wont hit landscape with custom trace channel](https://forums.unrealengine.com/t/trace-line-wont-hit-landscape-with-custom-trace-channel/1673980)
**Author:** [@Korred1](https://forums.unrealengine.com/u/Korred1)\ **Replies:** 1\ **Last updated:** [February 8, 2024, 11:14am UTC](https://forums.unrealengine.com/t/trace-line-wont-hit-landscape-with-custom-trace-channel/1673980 "2024-02-08T11:14:37Z")
Hello I am having problem with trace line hitting landscape I added custom channel “Landscape” When I change “trace channel” in “Line Trace By Channel” to “Visibility” it works fine I dont understand what se… --- ## [Intended usage of the Visibility Trace channel](https://forums.unrealengine.com/t/intended-usage-of-the-visibility-trace-channel/318587)
**Author:** [@ZorbaTHut\_1](https://forums.unrealengine.com/u/ZorbaTHut_1)\ **Replies:** 10\ **Last updated:** [November 13, 2023, 9:15pm UTC](https://forums.unrealengine.com/t/intended-usage-of-the-visibility-trace-channel/318587 "2023-11-13T21:15:45Z")
UE4 comes with two trace channels by default - Visibility and Camera. I’m trying to figure out what the intended purpose of the Visibility channel is. Visibility seems like it should be intuitive. I would generally assum… --- ## [Custom Trace Channel don't work](https://forums.unrealengine.com/t/custom-trace-channel-dont-work/346053)
**Author:** [@FilOne](https://forums.unrealengine.com/u/FilOne)\ **Replies:** 4\ **Last updated:** [July 25, 2023, 3:17pm UTC](https://forums.unrealengine.com/t/custom-trace-channel-dont-work/346053 "2023-07-25T15:17:15Z")
If create custom trace channel in Project Settings with default Ignore behaviour, it will won’t work with Line Trace By Channel in Blueprint. Despite the ignore config trace will be blocked. This problem isn’t pesented i… --- ## [How to get a trace hit on the opposite end of a wall?](https://forums.unrealengine.com/t/how-to-get-a-trace-hit-on-the-opposite-end-of-a-wall/388334)
**Author:** [@anonymous\_user\_28977aa2](https://forums.unrealengine.com/u/anonymous_user_28977aa2)\ **Replies:** 3\ **Last updated:** [July 9, 2023, 7:34pm UTC](https://forums.unrealengine.com/t/how-to-get-a-trace-hit-on-the-opposite-end-of-a-wall/388334 "2023-07-09T19:34:56Z")
I have a line trace emitting from the end of a gun and hitting a static mesh wall, but it only ‘hits’ the first side it touches and not the opposite side of the wall where the trace comes out. I’m trying some BP now that… --- ## [Custom trace channel in c++?](https://forums.unrealengine.com/t/custom-trace-channel-in-c/332130)
**Author:** [@Sneppy](https://forums.unrealengine.com/u/Sneppy)\ **Replies:** 6\ **Last updated:** [February 23, 2023, 4:27pm UTC](https://forums.unrealengine.com/t/custom-trace-channel-in-c/332130 "2023-02-23T16:27:34Z")
I created a custom trace channel from the collision tab in project settings. It may sound stupid but I have no idea how to use my new channel in c++: for example I want to do a single trace using my custom channel, how … --- ## [Collision Profile Name C++ // Help! Trace Hit Results wont show any custom collision profiles](https://forums.unrealengine.com/t/collision-profile-name-c-help-trace-hit-results-wont-show-any-custom-collision-profiles/736688)
**Author:** [@Subadventure](https://forums.unrealengine.com/u/Subadventure)\ **Replies:** 4\ **Last updated:** [January 1, 2023, 4:27am UTC](https://forums.unrealengine.com/t/collision-profile-name-c-help-trace-hit-results-wont-show-any-custom-collision-profiles/736688 "2023-01-01T04:27:11Z")
Hi! I added custom object channel in my project settings and set them as collision channel in my static mesh assets. Then i created SMFoliage Assets and set thier Static Mesh reference to that Static Meshes, i mentioned… --- ## [Linetrace Not Hitting Pawn Mesh](https://forums.unrealengine.com/t/linetrace-not-hitting-pawn-mesh/362304)
**Author:** [@mdmoberly](https://forums.unrealengine.com/u/mdmoberly)\ **Replies:** 1\ **Last updated:** [December 11, 2022, 10:15am UTC](https://forums.unrealengine.com/t/linetrace-not-hitting-pawn-mesh/362304 "2022-12-11T10:15:34Z")
In trying to research the issue I am experiencing, I have found multiple people with the same problem with no solution. When I do a linetrace by channel, by default, it does not hit the BP\_Actor. If I change the trace c… --- ## [\[4.26\] Engine freezes when playing with MultiLineTrace for custom Trace Channel](https://forums.unrealengine.com/t/4-26-engine-freezes-when-playing-with-multilinetrace-for-custom-trace-channel/488105)
**Author:** [@LordStuff](https://forums.unrealengine.com/u/LordStuff)\ **Replies:** 0\ **Last updated:** [August 28, 2021, 12:25am UTC](https://forums.unrealengine.com/t/4-26-engine-freezes-when-playing-with-multilinetrace-for-custom-trace-channel/488105 "2021-08-28T00:25:20Z")
I want to trace for a landscape and have problems doing so with the visibility trace as there can be some meshes blocking the visibility channel (stopping the multi line trace). I then tried to introduce a custom Landsc… --- ## [Why does SweepSingleByChannel not work with a Box?](https://forums.unrealengine.com/t/why-does-sweepsinglebychannel-not-work-with-a-box/393240)
**Author:** [@anon68466198](https://forums.unrealengine.com/u/anon68466198)\ **Replies:** 5\ **Last updated:** [August 13, 2021, 1:15pm UTC](https://forums.unrealengine.com/t/why-does-sweepsinglebychannel-not-work-with-a-box/393240 "2021-08-13T13:15:47Z")
FCollisionShape StructureCollision = StructureMesh-\>GetCollisionShape(); FHitResult Hit; FVector CollisionLocation; CollisionLocation = GetActorLocation(); CollisionLocation.Z += StructureCollision.GetBox().Z; … --- ## [Box trace not detecting all components?](https://forums.unrealengine.com/t/box-trace-not-detecting-all-components/486758)
**Author:** [@RianeN](https://forums.unrealengine.com/u/RianeN)\ **Replies:** 1\ **Last updated:** [July 29, 2021, 10:29am UTC](https://forums.unrealengine.com/t/box-trace-not-detecting-all-components/486758 "2021-07-29T10:29:04Z")
Trying to use a MultiBoxTraceByChannel to detect if a component exists within the box, but it’s not working. There are two types of components, tree and grass. Tree is literally just a duplicate of grass, but with a diff… --- ## [Line Trace - Checking ground hits - C++](https://forums.unrealengine.com/t/line-trace-checking-ground-hits-c/477829)
**Author:** [@Sheprekt](https://forums.unrealengine.com/u/Sheprekt)\ **Replies:** 1\ **Last updated:** [January 26, 2021, 10:46pm UTC](https://forums.unrealengine.com/t/line-trace-checking-ground-hits-c/477829 "2021-01-26T22:46:10Z")
I’m having a ton of issues with line tracing, and have read up on documentation but am still coming up short. Essentially, I am looking to “place” items in my world. An object is created hovering above the ground, and I… --- ## [Can I edit the Collsion presets?](https://forums.unrealengine.com/t/can-i-edit-the-collsion-presets/474350)
**Author:** [@EdBennett](https://forums.unrealengine.com/u/EdBennett)\ **Replies:** 0\ **Last updated:** [November 12, 2020, 7:24am UTC](https://forums.unrealengine.com/t/can-i-edit-the-collsion-presets/474350 "2020-11-12T07:24:58Z")
Hi I have created a new trace channel, now I would like this channel to be block by most things. But not pawns. I only seem to be able to set it’s default to ignore or block. Is their anyway I can change just the pawn ch… --- ## [How can i spawn a trace channel in front of a character?](https://forums.unrealengine.com/t/how-can-i-spawn-a-trace-channel-in-front-of-a-character/473148)
**Author:** [@ArborTree](https://forums.unrealengine.com/u/ArborTree)\ **Replies:** 2\ **Last updated:** [October 19, 2020, 10:00am UTC](https://forums.unrealengine.com/t/how-can-i-spawn-a-trace-channel-in-front-of-a-character/473148 "2020-10-19T10:00:15Z")
I used other functions like ‘Get relative location’. But, only based on world space, it is spawned. I want to spawn a multi trace channel in front of a character. How can i? Or should i upgrade the engine? 319246- --- ## [Trace By channel doesn't work with full screen mode](https://forums.unrealengine.com/t/trace-by-channel-doesnt-work-with-full-screen-mode/468942)
**Author:** [@G3nocide00](https://forums.unrealengine.com/u/G3nocide00)\ **Replies:** 7\ **Last updated:** [July 31, 2020, 3:43pm UTC](https://forums.unrealengine.com/t/trace-by-channel-doesnt-work-with-full-screen-mode/468942 "2020-07-31T15:43:47Z")
It would be useful if you added a picture of how you’re doing the tracing. Does this happen if you launch is standalone or new editor window? --- ## [All Characters jitter after I create a custom trace channel](https://forums.unrealengine.com/t/all-characters-jitter-after-i-create-a-custom-trace-channel/466368)
**Author:** [@BEnSon1101](https://forums.unrealengine.com/u/BEnSon1101)\ **Replies:** 1\ **Last updated:** [June 8, 2020, 12:01am UTC](https://forums.unrealengine.com/t/all-characters-jitter-after-i-create-a-custom-trace-channel/466368 "2020-06-08T00:01:19Z")
I created a default third person template Created custom trace channel set to block Created new character class and added a USphere and UCapsule component (and movement functionality) Created A derived blueprint class… --- ## [How to set up an isometric RPG camera](https://forums.unrealengine.com/t/how-to-set-up-an-isometric-rpg-camera/464806)
**Author:** [@King\_Genkei](https://forums.unrealengine.com/u/King_Genkei)\ **Replies:** 0\ **Last updated:** [May 7, 2020, 9:25am UTC](https://forums.unrealengine.com/t/how-to-set-up-an-isometric-rpg-camera/464806 "2020-05-07T09:25:52Z")
Hi, I am trying to get started with unreal, and I want to make an isometric RPG, like Baldurs or pillars or divinity. I am really struggling to make the camera behave like I want. I want the camera to be able to pass t… --- ## [Best way to implement AoE damage?](https://forums.unrealengine.com/t/best-way-to-implement-aoe-damage/463923)
**Author:** [@juztinmikael](https://forums.unrealengine.com/u/juztinmikael)\ **Replies:** 3\ **Last updated:** [April 19, 2020, 8:12am UTC](https://forums.unrealengine.com/t/best-way-to-implement-aoe-damage/463923 "2020-04-19T08:12:58Z")
I’m looking into a better concept or workaround for doing my Area of Effect damage system. Basically I have a character that can punch the ground, damaging the surrounding enemies within range. I’ve only been using Sphe… --- ## [Collision channel confusion](https://forums.unrealengine.com/t/collision-channel-confusion/463451)
**Author:** [@RyuMaster](https://forums.unrealengine.com/u/RyuMaster)\ **Replies:** 0\ **Last updated:** [April 7, 2020, 8:32pm UTC](https://forums.unrealengine.com/t/collision-channel-confusion/463451 "2020-04-07T20:32:49Z")
Why does my cube is detected as hit by GetHitResultAtScreenPosition(... , ETraceTypeQuery::TraceTypeQuery1, false, ...), when it is set to ignore custom trace channel “LandscapeTrace” ? if using if (this-\>controller-\>Ge… --- ## [Difficult field of vision without PawnSensing](https://forums.unrealengine.com/t/difficult-field-of-vision-without-pawnsensing/460979)
**Author:** [@Neeck\_Kola](https://forums.unrealengine.com/u/Neeck_Kola)\ **Replies:** 0\ **Last updated:** [January 27, 2020, 4:55pm UTC](https://forums.unrealengine.com/t/difficult-field-of-vision-without-pawnsensing/460979 "2020-01-27T16:55:49Z")
Hi, in my 2D game there is an enemy skeleton, respectively he has a field of vision in which he sees the player. The problem is that I need to create the skeleton’s field of view with the MultiTrace component, because Pa… --- ## [Loaded up Project for my level to not be there](https://forums.unrealengine.com/t/loaded-up-project-for-my-level-to-not-be-there/457442)
**Author:** [@DAYSRKONDR](https://forums.unrealengine.com/u/DAYSRKONDR)\ **Replies:** 0\ **Last updated:** [October 23, 2019, 10:45pm UTC](https://forums.unrealengine.com/t/loaded-up-project-for-my-level-to-not-be-there/457442 "2019-10-23T22:45:21Z")
I was working on a project tonight, saved it as i normally would. Then later loaded it up again for my usual level to not be there, just a blank canvas? I looked for my level and found what i thought was it. It is the l… --- ## [MultitraceSphereByChannel Detecting Player when Player is not hit](https://forums.unrealengine.com/t/multitracespherebychannel-detecting-player-when-player-is-not-hit/453844)
**Author:** [@FishOmelette](https://forums.unrealengine.com/u/FishOmelette)\ **Replies:** 0\ **Last updated:** [August 14, 2019, 1:10pm UTC](https://forums.unrealengine.com/t/multitracespherebychannel-detecting-player-when-player-is-not-hit/453844 "2019-08-14T13:10:31Z")
Hi, I’m trying to set up the enemy damaging system. As you can see from the images, the player wasn’t in the attack zone but was still registered as one of the hit actors (as printed out as a string). Is this a bug or is… --- ## [How do I use trace channel variable for trace responses?,How do I use a trace channel variable for trace responses?,Trace channel variable in trace responses?](https://forums.unrealengine.com/t/how-do-i-use-trace-channel-variable-for-trace-responses-how-do-i-use-a-trace-channel-variable-for-trace-responses-trace-channel-variable-in-trace-responses/448040)
**Author:** [@Craycayden](https://forums.unrealengine.com/u/Craycayden)\ **Replies:** 0\ **Last updated:** [April 29, 2019, 12:24pm UTC](https://forums.unrealengine.com/t/how-do-i-use-trace-channel-variable-for-trace-responses-how-do-i-use-a-trace-channel-variable-for-trace-responses-trace-channel-variable-in-trace-responses/448040 "2019-04-29T12:24:18Z")
I’ve created a variable for my trace channel but how do I use it in my trace responses section because I’m trying to make a wall jump function in UE4 third person and I’m only a beginner who just started using UE4 yester… --- ## [Change Predict Projectile Path Color](https://forums.unrealengine.com/t/change-predict-projectile-path-color/443092)
**Author:** [@anonymous\_user\_67eaea50](https://forums.unrealengine.com/u/anonymous_user_67eaea50)\ **Replies:** 1\ **Last updated:** [February 11, 2019, 12:49pm UTC](https://forums.unrealengine.com/t/change-predict-projectile-path-color/443092 "2019-02-11T12:49:29Z")
Hi! I have a Predict Projectile Path Trace by Channel and it has an automatic color (green). I need change the color. Thanks! \]\[1\] alt text [Next page](https://forums.unrealengine.com/tag/trace-channels/1520.md?match_all_tags=true&page=1&tags%5B%5D=trace-channels)