# \#bsp-brush **URL:** https://forums.unrealengine.com/tag/bsp-brush/1427.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [Converting brush to static mesh issue. Disappearing brush polygons](https://forums.unrealengine.com/t/converting-brush-to-static-mesh-issue-disappearing-brush-polygons/456705)
**Author:** [@Fourteent\_Doctor](https://forums.unrealengine.com/u/Fourteent_Doctor)\ **Replies:** 3\ **Last updated:** [March 6, 2026, 3:58am UTC](https://forums.unrealengine.com/t/converting-brush-to-static-mesh-issue-disappearing-brush-polygons/456705 "2026-03-06T03:58:27Z")
Hello. I am using UE 4.21 for my project. During production I noticed that at a certain amount of brushes, some of them are cutted off: some polygons just disappearing. Build All button didn’t help. I tried to convert… --- ## [Whenever the squeeze function in the brush editing mode is used, the program will crash. ](https://forums.unrealengine.com/t/whenever-the-squeeze-function-in-the-brush-editing-mode-is-used-the-program-will-crash/2385121)
**Author:** [@ThomasQi](https://forums.unrealengine.com/u/ThomasQi)\ **Replies:** 0\ **Last updated:** [March 11, 2025, 1:54pm UTC](https://forums.unrealengine.com/t/whenever-the-squeeze-function-in-the-brush-editing-mode-is-used-the-program-will-crash/2385121 "2025-03-11T13:54:17Z")
I’m sorry to disturb everyone, but I’m a novice. Whenever the squeeze function in the brush editing mode is used, the program will crash. And pop out this pop-up window. Please help me, thank you. --- ## [Why are my Directional Light settings not showing/reflected in the final build?](https://forums.unrealengine.com/t/why-are-my-directional-light-settings-not-showing-reflected-in-the-final-build/286308)
**Author:** [@Kagamusha](https://forums.unrealengine.com/u/Kagamusha)\ **Replies:** 8\ **Last updated:** [June 23, 2014, 9:56am UTC](https://forums.unrealengine.com/t/why-are-my-directional-light-settings-not-showing-reflected-in-the-final-build/286308 "2014-06-23T09:56:31Z")
I’ve made a basic level out of BSP to prototype something, however I’m having an issue with the lighting. The level is meant to be fairly dark however it looks like broad daylight. It looks perfectly fine in the editor… --- ## [UI for selecting edges, faces, verts in Brush Editing mode.](https://forums.unrealengine.com/t/ui-for-selecting-edges-faces-verts-in-brush-editing-mode/1778934)
**Author:** [@GenkiB](https://forums.unrealengine.com/u/GenkiB)\ **Replies:** 0\ **Last updated:** [March 30, 2024, 1:10pm UTC](https://forums.unrealengine.com/t/ui-for-selecting-edges-faces-verts-in-brush-editing-mode/1778934 "2024-03-30T13:10:57Z")
I am finding the current method of selecting edges to be cumbersome, it would be great if there was a button to only select edges or verts when clicking the BSP brush, much like in Blender etc. --- ## [Create BSP and convert to StaticMesh in C++](https://forums.unrealengine.com/t/create-bsp-and-convert-to-staticmesh-in-c/312922)
**Author:** [@sanchousf\_1](https://forums.unrealengine.com/u/sanchousf_1)\ **Replies:** 5\ **Last updated:** [February 12, 2024, 4:11pm UTC](https://forums.unrealengine.com/t/create-bsp-and-convert-to-staticmesh-in-c/312922 "2024-02-12T16:11:33Z")
I need some editable object in editor what converts in StaticMesh in game. I want to convert it automatically. I try to use UBrushComponent but I can’t found any documentation how use it. And even how convert ABrush to … --- ## [BSP brushes do not trigger collision events from line trace events](https://forums.unrealengine.com/t/bsp-brushes-do-not-trigger-collision-events-from-line-trace-events/483419)
**Author:** [@MStory](https://forums.unrealengine.com/u/MStory)\ **Replies:** 2\ **Last updated:** [January 31, 2024, 4:58am UTC](https://forums.unrealengine.com/t/bsp-brushes-do-not-trigger-collision-events-from-line-trace-events/483419 "2024-01-31T04:58:11Z")
BSP brushes do not trigger events when hit with line trace. I’ve made sure all the collision settings are correct and everything should work as intended. When testing, line trace turns green to indicate a hit but the eve… --- ## [ a section of my box brush is missing](https://forums.unrealengine.com/t/a-section-of-my-box-brush-is-missing/1651842)
**Author:** [@ahooper20172018](https://forums.unrealengine.com/u/ahooper20172018)\ **Replies:** 0\ **Last updated:** [January 29, 2024, 4:34pm UTC](https://forums.unrealengine.com/t/a-section-of-my-box-brush-is-missing/1651842 "2024-01-29T16:34:26Z")
Im not sure if its still called bsp but a section of my box is missing,all i did was Alt + left click to duplicate it and its messed up,i even added a new one,still the same result,never had this issue before but if s… --- ## [Line trace does not get hit location against a bsp](https://forums.unrealengine.com/t/line-trace-does-not-get-hit-location-against-a-bsp/1620604)
**Author:** [@ehownoob](https://forums.unrealengine.com/u/ehownoob)\ **Replies:** 0\ **Last updated:** [January 17, 2024, 2:25am UTC](https://forums.unrealengine.com/t/line-trace-does-not-get-hit-location-against-a-bsp/1620604 "2024-01-17T02:25:14Z")
I am currently using a line trace for a gun and using hit location to spawn a niagara system. However, the line trace seems to pass through BSPs and inconsistently. On the same bsp brush without any other things in the w… --- ## [BSP brush faces dissapearing for no reason](https://forums.unrealengine.com/t/bsp-brush-faces-dissapearing-for-no-reason/1324412)
**Author:** [@KarloRK0712](https://forums.unrealengine.com/u/KarloRK0712)\ **Replies:** 0\ **Last updated:** [October 6, 2023, 4:32pm UTC](https://forums.unrealengine.com/t/bsp-brush-faces-dissapearing-for-no-reason/1324412 "2023-10-06T16:32:04Z")
So, I was working on a map with BSP brushes, everything was fine until one morning I woke up, went to work and for some reason the majority of the BSP brushes that made up the map didn’t have the majority of their faces. … --- ## [BSP Brushes disappeared (UE5EA) How do I get them back?](https://forums.unrealengine.com/t/bsp-brushes-disappeared-ue5ea-how-do-i-get-them-back/546009)
**Author:** [@lemon123](https://forums.unrealengine.com/u/lemon123)\ **Replies:** 0\ **Last updated:** [May 1, 2022, 9:40pm UTC](https://forums.unrealengine.com/t/bsp-brushes-disappeared-ue5ea-how-do-i-get-them-back/546009 "2022-05-01T21:40:16Z")
Hello, I build a Level with many BSP Brushes. After “build lighting only” all Box-Brushes are invisible. They are still viewable in the WorldOutliner and if I double click on them I can see the pivot and the yellow fram… --- ## [Bsp face selection problem](https://forums.unrealengine.com/t/bsp-face-selection-problem/482277)
**Author:** [@iddqd13](https://forums.unrealengine.com/u/iddqd13)\ **Replies:** 1\ **Last updated:** [September 23, 2021, 2:58pm UTC](https://forums.unrealengine.com/t/bsp-face-selection-problem/482277 "2021-09-23T14:58:12Z")
i have problem selecting bsp faces. When i try to select faces sometimes it selects it or sometimes just highlights the face with different color. on the screenshot one face is really selected and the other one is ju… --- ## [How to set bsp brush material c++](https://forums.unrealengine.com/t/how-to-set-bsp-brush-material-c/470890)
**Author:** [@tangfuling](https://forums.unrealengine.com/u/tangfuling)\ **Replies:** 0\ **Last updated:** [September 6, 2020, 4:26am UTC](https://forums.unrealengine.com/t/how-to-set-bsp-brush-material-c/470890 "2020-09-06T04:26:11Z")
How to set bsp brush surface material by c++? --- ## [BSP Dynamic change Surface Materials and Surface Properties](https://forums.unrealengine.com/t/bsp-dynamic-change-surface-materials-and-surface-properties/441005)
**Author:** [@anonymous\_user\_e63c66bf](https://forums.unrealengine.com/u/anonymous_user_e63c66bf)\ **Replies:** 2\ **Last updated:** [September 5, 2020, 1:48pm UTC](https://forums.unrealengine.com/t/bsp-dynamic-change-surface-materials-and-surface-properties/441005 "2020-09-05T13:48:28Z")
Hi All I have a question for BSP material, I have two box brush, the one is Subtractive the other one like picture I want Dynamic get or set Box Brush every Surface material on level blueprint or C++ How can I d… --- ## [Is it possible to create rectangular windows that can change sizes on a wall?](https://forums.unrealengine.com/t/is-it-possible-to-create-rectangular-windows-that-can-change-sizes-on-a-wall/468916)
**Author:** [@anonymous\_user\_ccd79233](https://forums.unrealengine.com/u/anonymous_user_ccd79233)\ **Replies:** 3\ **Last updated:** [July 31, 2020, 7:20am UTC](https://forums.unrealengine.com/t/is-it-possible-to-create-rectangular-windows-that-can-change-sizes-on-a-wall/468916 "2020-07-31T07:20:10Z")
Hi guys, I am trying to create the feature that “allows the player to create windows on the wall and the size of the windows can be adjusted.” I don’t know how I can create a rectangular hole that can be changed in runti… --- ## [Is it possible to save a custom brush?](https://forums.unrealengine.com/t/is-it-possible-to-save-a-custom-brush/283348)
**Author:** [@KnightTechDev](https://forums.unrealengine.com/u/KnightTechDev)\ **Replies:** 3\ **Last updated:** [July 31, 2020, 2:35am UTC](https://forums.unrealengine.com/t/is-it-possible-to-save-a-custom-brush/283348 "2020-07-31T02:35:24Z")
Is it possible to save a custom brush for re-use in other levels instead of converting it to Static Mesh and then Blueprint? --- ## [Can't edit BSP geometry after Optimize operation](https://forums.unrealengine.com/t/cant-edit-bsp-geometry-after-optimize-operation/457400)
**Author:** [@tvirinae](https://forums.unrealengine.com/u/tvirinae)\ **Replies:** 0\ **Last updated:** [October 23, 2019, 12:26pm UTC](https://forums.unrealengine.com/t/cant-edit-bsp-geometry-after-optimize-operation/457400 "2019-10-23T12:26:27Z")
Hello guys. When I choose “optimize” button in Geometry Edit section (I did it for better checker material order) I can’t edit this geometry anymore - move vertexes, faces etc. Only extrude allowed. What I did wrong? J… --- ## [How can I use the Subtractive BSP on one Additive BSP Brush, not another?](https://forums.unrealengine.com/t/how-can-i-use-the-subtractive-bsp-on-one-additive-bsp-brush-not-another/453402)
**Author:** [@anonymous\_user\_e942c2ca](https://forums.unrealengine.com/u/anonymous_user_e942c2ca)\ **Replies:** 2\ **Last updated:** [August 16, 2019, 11:16am UTC](https://forums.unrealengine.com/t/how-can-i-use-the-subtractive-bsp-on-one-additive-bsp-brush-not-another/453402 "2019-08-16T11:16:18Z")
Hi, So I’m making a level in UE4, mostly using BSP brushes at the moment. I have a floor and a wall, both are made from Additive BSP brushes. I want to create a Subtractive BSP brush on the wall to create a Door, but I… --- ## [Why the bsp brush doesnt show in wireframe either cant be selected](https://forums.unrealengine.com/t/why-the-bsp-brush-doesnt-show-in-wireframe-either-cant-be-selected/294781)
**Author:** [@jdjd12](https://forums.unrealengine.com/u/jdjd12)\ **Replies:** 6\ **Last updated:** [March 19, 2019, 6:28pm UTC](https://forums.unrealengine.com/t/why-the-bsp-brush-doesnt-show-in-wireframe-either-cant-be-selected/294781 "2019-03-19T18:28:31Z")
the bsp brush doesnt show in wireframe mode and also cant be selected in real-time mode,even disappear in actors window,i can only select the face. --- ## [BSP geometry wireframe flicker](https://forums.unrealengine.com/t/bsp-geometry-wireframe-flicker/392913)
**Author:** [@FordonGreeman4](https://forums.unrealengine.com/u/FordonGreeman4)\ **Replies:** 7\ **Last updated:** [May 12, 2017, 3:57pm UTC](https://forums.unrealengine.com/t/bsp-geometry-wireframe-flicker/392913 "2017-05-12T15:57:36Z")
Hey, I’ve got this problem that wireframe of BSP brushes flicker. It’s not something serious, but definitely annoying. Any idea how can I solve that problem? If you wonder, my gpu is geforce 1070 (with latest drivers 38… --- ## [BSP Box not showing](https://forums.unrealengine.com/t/bsp-box-not-showing/359768)
**Author:** [@Nawaf\_Al-Rawachy](https://forums.unrealengine.com/u/Nawaf_Al-Rawachy)\ **Replies:** 2\ **Last updated:** [May 6, 2017, 4:39am UTC](https://forums.unrealengine.com/t/bsp-box-not-showing/359768 "2017-05-06T04:39:03Z")
BSP boxes worked just fine before, for some reason, they are not showing up now :frowning: --- ## [Near BSPs to flipped one turn hidden?](https://forums.unrealengine.com/t/near-bsps-to-flipped-one-turn-hidden/304878)
**Author:** [@Hevedy](https://forums.unrealengine.com/u/Hevedy)\ **Replies:** 3\ **Last updated:** [April 28, 2017, 8:13pm UTC](https://forums.unrealengine.com/t/near-bsps-to-flipped-one-turn-hidden/304878 "2017-04-28T20:13:18Z")
If turn a BSP flipped the next to this brush turn invisible/hidden. Image: https://dl.dropboxusercontent.com/u/28070491/UE/Forums/HideBug.png --- ## [What is the best practice between BSP and static mesh?](https://forums.unrealengine.com/t/what-is-the-best-practice-between-bsp-and-static-mesh/380462)
**Author:** [@leofucci](https://forums.unrealengine.com/u/leofucci)\ **Replies:** 1\ **Last updated:** [January 2, 2017, 2:34am UTC](https://forums.unrealengine.com/t/what-is-the-best-practice-between-bsp-and-static-mesh/380462 "2017-01-02T02:34:47Z")
Sorry to bother, but what is the difference between a static mesh and a BSP? What is a BSP? I want to create a Room with walls, floor, roof, columns, some fixed lights, etc…, should I Use bsp or static mesh? What I wa… --- ## [\[BUG\] sorting subtractive brush to last crashes editor](https://forums.unrealengine.com/t/bug-sorting-subtractive-brush-to-last-crashes-editor/377374)
**Author:** [@anonymous\_user\_0d28b611](https://forums.unrealengine.com/u/anonymous_user_0d28b611)\ **Replies:** 3\ **Last updated:** [November 28, 2016, 4:19pm UTC](https://forums.unrealengine.com/t/bug-sorting-subtractive-brush-to-last-crashes-editor/377374 "2016-11-28T16:19:05Z")
Steps to reproduce: Create a new project with the first person template Create a new level Add a landscape Use Geometry to create a hollow additive box Create a subtractive box to put a hole in the box, al… --- ## [After converting BSP to static mesh there is error in geometry](https://forums.unrealengine.com/t/after-converting-bsp-to-static-mesh-there-is-error-in-geometry/376821)
**Author:** [@BlackPrince](https://forums.unrealengine.com/u/BlackPrince)\ **Replies:** 8\ **Last updated:** [November 19, 2016, 5:50pm UTC](https://forums.unrealengine.com/t/after-converting-bsp-to-static-mesh-there-is-error-in-geometry/376821 "2016-11-19T17:50:55Z")
Hello everyone. My problem is when converting from BSP to static mesh, after converting there is strange shadows on surfaces, which also damaging texture quality. Before converting (used Box as substractive on Cylinder… --- ## [Parts of BSP Brush disappearing](https://forums.unrealengine.com/t/parts-of-bsp-brush-disappearing/345151)
**Author:** [@Starfox64](https://forums.unrealengine.com/u/Starfox64)\ **Replies:** 3\ **Last updated:** [November 14, 2016, 8:39pm UTC](https://forums.unrealengine.com/t/parts-of-bsp-brush-disappearing/345151 "2016-11-14T20:39:36Z")
Hello, I am trying to make a road using BSPs however something rather odd is happening with them. If I remove faces of a BSP that I don’t need (bottom, sides, etc) and I place another BSP next to it, it will interfere w… --- ## [BSP Shadows/Light](https://forums.unrealengine.com/t/bsp-shadows-light/317226)
**Author:** [@anonymous\_user\_4bbf8dca](https://forums.unrealengine.com/u/anonymous_user_4bbf8dca)\ **Replies:** 2\ **Last updated:** [October 23, 2016, 5:39am UTC](https://forums.unrealengine.com/t/bsp-shadows-light/317226 "2016-10-23T05:39:42Z")
Is there away to fix this light bleeding? I think this is a lightmap streaming/mipmap limitation but I want to know how to fix it for every BSP brush. Im using a resolution of 2.0 for BSPs and building lighting on p… --- ## [(動画チュートリアル関連) 減算ブラシをうまく配置するためには](https://forums.unrealengine.com/t/topic/371039)
**Author:** [@ymars](https://forums.unrealengine.com/u/ymars)\ **Replies:** 1\ **Last updated:** [September 20, 2016, 6:53am UTC](https://forums.unrealengine.com/t/topic/371039 "2016-09-20T06:53:11Z")
動画チュートリアルで減算ブラシを使う回があるのですが、その位置の微調整が上手くいかない場合は？ :arrow\_forward:関連する動画チュートリアル Introduction to UE4 Level Creation (v4.7) 3 - Adding Windows and Doors --- ## [(動画チュートリアル関連) ブラシとは？](https://forums.unrealengine.com/t/topic/370939)
**Author:** [@ymars](https://forums.unrealengine.com/u/ymars)\ **Replies:** 1\ **Last updated:** [September 19, 2016, 11:30am UTC](https://forums.unrealengine.com/t/topic/370939 "2016-09-19T11:30:32Z")
動画チュートリアルで使われているジオメトリ (ブラシ) とはどのようなものなのでしょうか？スタティック メッシュとはどう違うのでしょうか？ :arrow\_forward:関連する動画チュートリアル Introduction to UE4 Level Creation (v4.7) 2 - Geometry Layout --- ## [Missing triangles in BSP geometry after building (Linux)](https://forums.unrealengine.com/t/missing-triangles-in-bsp-geometry-after-building-linux/359579)
**Author:** [@rflori](https://forums.unrealengine.com/u/rflori)\ **Replies:** 4\ **Last updated:** [July 6, 2016, 8:17pm UTC](https://forums.unrealengine.com/t/missing-triangles-in-bsp-geometry-after-building-linux/359579 "2016-07-06T20:17:06Z")
Hi, I tried the Unreal Engine 4 the during the last weeks and now I wanted to build my first small level. So I prototyped it with BSP brushes (geometry). But as the geometry gets more complex I experienced really ugly l… --- ## [BSP and mesh Objects UE4](https://forums.unrealengine.com/t/bsp-and-mesh-objects-ue4/353115)
**Author:** [@JodyLS27](https://forums.unrealengine.com/u/JodyLS27)\ **Replies:** 0\ **Last updated:** [April 6, 2016, 5:49am UTC](https://forums.unrealengine.com/t/bsp-and-mesh-objects-ue4/353115 "2016-04-06T05:49:07Z")
Hi there Everyone, Im very new to Unreal engine 4, and have debled a bit here and there with the level design tutorial on the site. I would like to understand how the whole BSP and Mesh objects are saposed to work for … [Next page](https://forums.unrealengine.com/tag/bsp-brush/1427.md?match_all_tags=true&page=1&tags%5B%5D=bsp-brush)