# \#geometry **URL:** https://forums.unrealengine.com/tag/geometry/1713.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [How to make side walls for a raised dirt road.](https://forums.unrealengine.com/t/how-to-make-side-walls-for-a-raised-dirt-road/2846378)
**Author:** [@Hoboayoyo](https://forums.unrealengine.com/u/Hoboayoyo)\ **Replies:** 0\ **Last updated:** [October 28, 2026, 7:06pm UTC](https://forums.unrealengine.com/t/how-to-make-side-walls-for-a-raised-dirt-road/2846378 "2026-10-28T19:06:07Z")
I am trying to make a spline path in unreal using PCG and blueprints. The spline spawns a dirt road mesh, and if the mesh is high above the ground it will generate walls. The walls have two main sets of arrays that are c… --- ## [Geometry Collection loses collision after breaking/fracturing. \[Chaos Destruction\]](https://forums.unrealengine.com/t/geometry-collection-loses-collision-after-breaking-fracturing-chaos-destruction/2684190)
**Author:** [@Eight\_P](https://forums.unrealengine.com/u/Eight_P)\ **Replies:** 8\ **Last updated:** [March 19, 2026, 12:25pm UTC](https://forums.unrealengine.com/t/geometry-collection-loses-collision-after-breaking-fracturing-chaos-destruction/2684190 "2026-03-19T12:25:53Z")
I have been recently looking into Chaos destruction with 5.7 and encountered numerous scenarios of Geometry Collections losing their collision (at runtime) in unexpected (and hopefully unintended) ways. The issue seems … --- ## [How to add an impulse to a geometry collection?](https://forums.unrealengine.com/t/how-to-add-an-impulse-to-a-geometry-collection/2698360)
**Author:** [@DanielOS96](https://forums.unrealengine.com/u/DanielOS96)\ **Replies:** 5\ **Last updated:** [March 3, 2026, 6:15am UTC](https://forums.unrealengine.com/t/how-to-add-an-impulse-to-a-geometry-collection/2698360 "2026-03-03T06:15:22Z")
Hi, I am trying to add an impulse to a geometry collection at a hit location how can I do that? When I use the blueprint below there is no response from the Geometry Collection. I am trying to make a first person gam… --- ## [Chaos Vehicle suspension constraints become permanently unstable after GeometryCollection fracture in same solver ](https://forums.unrealengine.com/t/chaos-vehicle-suspension-constraints-become-permanently-unstable-after-geometrycollection-fracture-in-same-solver/2685338)
**Author:** [@SAS-DXB](https://forums.unrealengine.com/u/SAS-DXB)\ **Replies:** 0\ **Last updated:** [December 16, 2025, 1:42am UTC](https://forums.unrealengine.com/t/chaos-vehicle-suspension-constraints-become-permanently-unstable-after-geometrycollection-fracture-in-same-solver/2685338 "2025-12-16T01:42:19Z")
Engine Version: UE 5.7.1 (did not reproduce in 5.5) Summary: When a GeometryCollection fractures in the same Chaos solver as a Chaos Vehicle, the vehicle’s suspension constraints become unstable and remain unstable ind… --- ## [Weird lighting on low poly character (UE 5.6.1)](https://forums.unrealengine.com/t/weird-lighting-on-low-poly-character-ue-5-6-1/2651279)
**Author:** [@BlackDoc1999](https://forums.unrealengine.com/u/BlackDoc1999)\ **Replies:** 4\ **Last updated:** [August 30, 2025, 9:24am UTC](https://forums.unrealengine.com/t/weird-lighting-on-low-poly-character-ue-5-6-1/2651279 "2025-08-30T09:24:25Z")
When I import my skeletal mesh into unreal there is a weird lighting effect that happens to the mesh. In blender I have it set to flat (no smoothing) and just in case I also have all of the tris edges set to sharp. When … --- ## [Niagara particles do not collide with geometry collections](https://forums.unrealengine.com/t/niagara-particles-do-not-collide-with-geometry-collections/2531296)
**Author:** [@XD\_XD2](https://forums.unrealengine.com/u/XD_XD2)\ **Replies:** 1\ **Last updated:** [May 28, 2025, 1:15pm UTC](https://forums.unrealengine.com/t/niagara-particles-do-not-collide-with-geometry-collections/2531296 "2025-05-28T13:15:43Z")
I’m making a rock sculpture with Niagara particles and I have a cliff made with geometry cache and I’m trying to collide the rock sculpture with the cliff but it doesn’t recognize the geometry cache as a collider at a… --- ## [\[UE 5.5\] Geometry Collection shadows is broken when using with Point, Spot and Rect Lights](https://forums.unrealengine.com/t/ue-5-5-geometry-collection-shadows-is-broken-when-using-with-point-spot-and-rect-lights/2385148)
**Author:** [@ShadowZAIN](https://forums.unrealengine.com/u/ShadowZAIN)\ **Replies:** 1\ **Last updated:** [April 24, 2025, 4:00pm UTC](https://forums.unrealengine.com/t/ue-5-5-geometry-collection-shadows-is-broken-when-using-with-point-spot-and-rect-lights/2385148 "2025-04-24T16:00:53Z")
In the screenshot, you can see 2 shadows, one from Direction Light, the other from Point Light. The shadow from Point Light is broken. Many light settings have been tried, which did not affect this problem in any way. … --- ## [(UDynamicMesh / Geometry Script): DynamicMesh not connecting properly](https://forums.unrealengine.com/t/udynamicmesh-geometry-script-dynamicmesh-not-connecting-properly/2450908)
**Author:** [@MariusPVI](https://forums.unrealengine.com/u/MariusPVI)\ **Replies:** 0\ **Last updated:** [April 11, 2025, 9:07am UTC](https://forums.unrealengine.com/t/udynamicmesh-geometry-script-dynamicmesh-not-connecting-properly/2450908 "2025-04-11T09:07:08Z")
Hi all, I’m currently working with several surface meshes in UE5 (via UDynamicMeshComponent) that are almost connected, and my goal is to merge them into a single watertight mesh. I started by creating a UDynamicMeshCo… --- ## [Crashing problems when replacing geometry collection at runtime](https://forums.unrealengine.com/t/crashing-problems-when-replacing-geometry-collection-at-runtime/2429665)
**Author:** [@Great\_Elector1](https://forums.unrealengine.com/u/Great_Elector1)\ **Replies:** 0\ **Last updated:** [March 30, 2025, 6:18pm UTC](https://forums.unrealengine.com/t/crashing-problems-when-replacing-geometry-collection-at-runtime/2429665 "2025-03-30T18:18:05Z")
I am getting a crash when I spawn an actor with a geometry collection and switch the rest collection at runtime, but only with certain collections. When a space ship explodes, it will spawn an actor that contains a geom… --- ## [Chaos Fracture Mode 5.3 May Be Broken](https://forums.unrealengine.com/t/chaos-fracture-mode-5-3-may-be-broken/1309319)
**Author:** [@Matt42042069](https://forums.unrealengine.com/u/Matt42042069)\ **Replies:** 9\ **Last updated:** [March 26, 2025, 10:37am UTC](https://forums.unrealengine.com/t/chaos-fracture-mode-5-3-may-be-broken/1309319 "2025-03-26T10:37:02Z")
I have a game with full scale buildings that are destructible with full interiors since upgrading to 5.3 most of my maps with anything destructible on it will open anymore, none of my original models will fracture at all… --- ## [I don't do crash action on the geometry collection I've spawned with bp. ](https://forums.unrealengine.com/t/i-dont-do-crash-action-on-the-geometry-collection-ive-spawned-with-bp/2404781)
**Author:** [@4f9d576ef76d406cb479093975606244](https://forums.unrealengine.com/u/4f9d576ef76d406cb479093975606244)\ **Replies:** 0\ **Last updated:** [March 21, 2025, 1:35pm UTC](https://forums.unrealengine.com/t/i-dont-do-crash-action-on-the-geometry-collection-ive-spawned-with-bp/2404781 "2025-03-21T13:35:40Z")
SpawnActor Set Rest Collection Set Simulate Physics Set Enable Gravity Set Collision Enabled Set Collision Profile Name Set Collision Response to Channel delay (0.1초) check movable I’ve done everything that Gpt, Claude… --- ## [BUG: Geometry Script Polygroup Angle](https://forums.unrealengine.com/t/bug-geometry-script-polygroup-angle/1691634)
**Author:** [@DELGOODIE](https://forums.unrealengine.com/u/DELGOODIE)\ **Replies:** 2\ **Last updated:** [February 4, 2025, 9:10pm UTC](https://forums.unrealengine.com/t/bug-geometry-script-polygroup-angle/1691634 "2025-02-04T21:10:29Z")
Here is a simple reproducible script computing polygroups from Angle and then setting materials for each poly group (purely for visualization). Running this script on a simple cylinder results in only one side correc… --- ## [How to convert a custom full body character to a metahuman ?](https://forums.unrealengine.com/t/how-to-convert-a-custom-full-body-character-to-a-metahuman/2267117)
**Author:** [@Pastaboxa](https://forums.unrealengine.com/u/Pastaboxa)\ **Replies:** 0\ **Last updated:** [January 9, 2025, 2:04am UTC](https://forums.unrealengine.com/t/how-to-convert-a-custom-full-body-character-to-a-metahuman/2267117 "2025-01-09T02:04:11Z")
Hello ! I have created a full custom character in blender (already retopo and textured), which is a little girl wearing a yukata, she has a custom hair groom with some hair of different colors, and long fox ears as well… --- ## [UE 5.4 Changing geometry collections scale keeps crashing the engine](https://forums.unrealengine.com/t/ue-5-4-changing-geometry-collections-scale-keeps-crashing-the-engine/1900700)
**Author:** [@Zuyas](https://forums.unrealengine.com/u/Zuyas)\ **Replies:** 2\ **Last updated:** [September 10, 2024, 2:51pm UTC](https://forums.unrealengine.com/t/ue-5-4-changing-geometry-collections-scale-keeps-crashing-the-engine/1900700 "2024-09-10T14:51:46Z")
When changing the geometry collection’s world scale in a blueprint, my engine always crash since 5.4. In 4.3 it worked fine. this gave me a nice effect of the particles fading away. Now the effect is: Any ideas … --- ## [UE 5.4.1 Plane and Box mesh boolean bug](https://forums.unrealengine.com/t/ue-5-4-1-plane-and-box-mesh-boolean-bug/1856581)
**Author:** [@ninja\_c](https://forums.unrealengine.com/u/ninja_c)\ **Replies:** 2\ **Last updated:** [July 23, 2024, 2:41am UTC](https://forums.unrealengine.com/t/ue-5-4-1-plane-and-box-mesh-boolean-bug/1856581 "2024-07-23T02:41:51Z")
Please select what you are reporting on: Creative What Type of Bug are you experiencing? Other Summary Plane and a Box mesh subtract operation results in a deformed mesh when the tool mesh (box) is not intersecting pla… --- ## [Nanite-Fallback light error](https://forums.unrealengine.com/t/nanite-fallback-light-error/1871233)
**Author:** [@ColorSkyRabbit](https://forums.unrealengine.com/u/ColorSkyRabbit)\ **Replies:** 0\ **Last updated:** [May 24, 2024, 5:39pm UTC](https://forums.unrealengine.com/t/nanite-fallback-light-error/1871233 "2024-05-24T17:39:32Z")
Hello everyone, I downloaded the ladder from the Bridge for example, and even there are shadow artifacts if you do not turn on the fallback Target (On the left it is turned on and set to zero, on the right it is automati… --- ## [How to get perpendicular angle to vector?](https://forums.unrealengine.com/t/how-to-get-perpendicular-angle-to-vector/489824)
**Author:** [@Yaklakootmaa2](https://forums.unrealengine.com/u/Yaklakootmaa2)\ **Replies:** 4\ **Last updated:** [May 18, 2024, 3:29pm UTC](https://forums.unrealengine.com/t/how-to-get-perpendicular-angle-to-vector/489824 "2024-05-18T15:29:58Z")
Is there a way to calculate the perpendicular angle to some vector? As a rotation axis, it will be Z --- ## [Skeletal Mesh Regenerate LODs = bad results? Please help](https://forums.unrealengine.com/t/skeletal-mesh-regenerate-lods-bad-results-please-help/1857565)
**Author:** [@Some](https://forums.unrealengine.com/u/Some)\ **Replies:** 0\ **Last updated:** [May 15, 2024, 5:23pm UTC](https://forums.unrealengine.com/t/skeletal-mesh-regenerate-lods-bad-results-please-help/1857565 "2024-05-15T17:23:31Z")
Regenerating LODs for my Skeletal Mesh is producing bad results. Many folds & bad choices in destruction: Unable to produce consistent results regenerating Metahuman LOD 1 inside UE 5.4. The problem persists in a… --- ## [How to convert Nanite to a Simple Mesh?](https://forums.unrealengine.com/t/how-to-convert-nanite-to-a-simple-mesh/1787180)
**Author:** [@unit23](https://forums.unrealengine.com/u/unit23)\ **Replies:** 2\ **Last updated:** [April 4, 2024, 6:24pm UTC](https://forums.unrealengine.com/t/how-to-convert-nanite-to-a-simple-mesh/1787180 "2024-04-04T18:24:33Z")
I would like to convert City Sample buildings with their big geometry down to a single mesh, ideally only with the the outer mesh rendered. The motivation is to use those as scenic background architecture props. Is the… --- ## [Geometry Script problems with boolean and not only](https://forums.unrealengine.com/t/geometry-script-problems-with-boolean-and-not-only/752831)
**Author:** [@AnteIvnif](https://forums.unrealengine.com/u/AnteIvnif)\ **Replies:** 3\ **Last updated:** [March 31, 2024, 3:38pm UTC](https://forums.unrealengine.com/t/geometry-script-problems-with-boolean-and-not-only/752831 "2024-03-31T15:38:14Z")
Hello everyone. I ran into two problems in Geometry Scripts. I’m trying to make a wall with a window where the wall is a plain from which a cube is subtracted. At this point, another plain is created and extruded into th… --- ## [I'm making a map with geometry, but I don't know what the benefits are](https://forums.unrealengine.com/t/im-making-a-map-with-geometry-but-i-dont-know-what-the-benefits-are/1777764)
**Author:** [@99st](https://forums.unrealengine.com/u/99st)\ **Replies:** 1\ **Last updated:** [March 29, 2024, 6:59pm UTC](https://forums.unrealengine.com/t/im-making-a-map-with-geometry-but-i-dont-know-what-the-benefits-are/1777764 "2024-03-29T18:59:12Z")
I’m going to make it into Wolfenstein Doom style with extreme minimalism of pixel texture But geometry seems taking more resources while editing i think, so it feels like it’s stuttering I think the static mesh that… --- ## [How to spawn chaos destruction geometry collection?](https://forums.unrealengine.com/t/how-to-spawn-chaos-destruction-geometry-collection/456386)
**Author:** [@DredyKabal](https://forums.unrealengine.com/u/DredyKabal)\ **Replies:** 5\ **Last updated:** [March 25, 2024, 10:34pm UTC](https://forums.unrealengine.com/t/how-to-spawn-chaos-destruction-geometry-collection/456386 "2024-03-25T22:34:02Z")
Hi all, I am trying to spawn chaos destruction’s geometry collection. is it even Possible, what would be the best way to go about it? thanks --- ## [Does it possible to set surface type to geometry brush](https://forums.unrealengine.com/t/does-it-possible-to-set-surface-type-to-geometry-brush/1739022)
**Author:** [@99st](https://forums.unrealengine.com/u/99st)\ **Replies:** 0\ **Last updated:** [March 8, 2024, 11:55pm UTC](https://forums.unrealengine.com/t/does-it-possible-to-set-surface-type-to-geometry-brush/1739022 "2024-03-08T23:55:33Z")
i made simple wall-through-shot that piercing differently by each surface type, and it works on static mashes map, possible to put material on it, but geometry brush, it can’t be as i tried, wanna ask this’ does it po… --- ## [How to transform uv to radial shape](https://forums.unrealengine.com/t/how-to-transform-uv-to-radial-shape/388207)
**Author:** [@SbingBong](https://forums.unrealengine.com/u/SbingBong)\ **Replies:** 4\ **Last updated:** [February 21, 2024, 8:28pm UTC](https://forums.unrealengine.com/t/how-to-transform-uv-to-radial-shape/388207 "2024-02-21T20:28:33Z")
I’m looking for a way to take world position coordinates masked to R & G (x,y) and feed it into the custom uvs property so it makes a texture sample near zero width at the top and wrap into itself at 360 degrees. I’ve be… --- ## [The brush editing mode turns BSP geometry white, unable to see the grid.](https://forums.unrealengine.com/t/the-brush-editing-mode-turns-bsp-geometry-white-unable-to-see-the-grid/1496567)
**Author:** [@eliasgalvanix](https://forums.unrealengine.com/u/eliasgalvanix)\ **Replies:** 1\ **Last updated:** [December 7, 2023, 5:24pm UTC](https://forums.unrealengine.com/t/the-brush-editing-mode-turns-bsp-geometry-white-unable-to-see-the-grid/1496567 "2023-12-07T17:24:28Z")
Is it supposed to glow like this? It really makes it hard to work with it. --- ## [How to programmatically enable gravity on a UGeometryCollectionComponent](https://forums.unrealengine.com/t/how-to-programmatically-enable-gravity-on-a-ugeometrycollectioncomponent/1332736)
**Author:** [@rstojano](https://forums.unrealengine.com/u/rstojano)\ **Replies:** 1\ **Last updated:** [October 17, 2023, 10:20pm UTC](https://forums.unrealengine.com/t/how-to-programmatically-enable-gravity-on-a-ugeometrycollectioncomponent/1332736 "2023-10-17T22:20:05Z")
I have an actor class called ABreakableActor which holds a: UGeometryCollectionComponent\* BreakableMeshComponent; I have inherited this class with a BP that disables the gravity of the component so it just floats there… --- ## [Heavily utilizing Nanite in a solo indie game](https://forums.unrealengine.com/t/heavily-utilizing-nanite-in-a-solo-indie-game/1291708)
**Author:** [@7Kelt7](https://forums.unrealengine.com/u/7Kelt7)\ **Replies:** 1\ **Last updated:** [September 12, 2023, 1:08am UTC](https://forums.unrealengine.com/t/heavily-utilizing-nanite-in-a-solo-indie-game/1291708 "2023-09-12T01:08:19Z")
I’m often reading contradictory statements about Nanite, some say that there are no drawbacks to it if used on static geometry, and other say that for some reason high poly with Nanite will lead to poor performance or ma… --- ## [Increased Vertex Count after Importing FBX](https://forums.unrealengine.com/t/increased-vertex-count-after-importing-fbx/387880)
**Author:** [@hitarth1994](https://forums.unrealengine.com/u/hitarth1994)\ **Replies:** 5\ **Last updated:** [August 29, 2023, 6:12pm UTC](https://forums.unrealengine.com/t/increased-vertex-count-after-importing-fbx/387880 "2023-08-29T18:12:26Z")
Hi, I have Imported some Static Meshes in both UE4.14 and Unity 5.5, which were Created in Maya & Max (2014) and Exported from Max (2014). The UVs were Mapped for each Mesh. The Mesh was also Triangulated before Expor… --- ## [Runtime Support for "CopyMeshToStaticMesh"](https://forums.unrealengine.com/t/runtime-support-for-copymeshtostaticmesh/1184532)
**Author:** [@SimPro2023](https://forums.unrealengine.com/u/SimPro2023)\ **Replies:** 3\ **Last updated:** [June 21, 2023, 8:09am UTC](https://forums.unrealengine.com/t/runtime-support-for-copymeshtostaticmesh/1184532 "2023-06-21T08:09:47Z")
I looked into the source code of this particular node. Its encapsulated in #if WITH\_EDITOR Statement in Unreal Version 5.2 :sweat\_smile: The node “CopyMeshToStaticMesh” should or could have full runtime support. At l… --- ## [Can't get the accurate number of drawn triangles per frame](https://forums.unrealengine.com/t/cant-get-the-accurate-number-of-drawn-triangles-per-frame/1185514)
**Author:** [@trezznor](https://forums.unrealengine.com/u/trezznor)\ **Replies:** 5\ **Last updated:** [June 5, 2023, 8:52pm UTC](https://forums.unrealengine.com/t/cant-get-the-accurate-number-of-drawn-triangles-per-frame/1185514 "2023-06-05T20:52:43Z")
I’m using Unreal Engine 5.1. I have a scene comprising a grid of objects only (nothing else in the scene, no plane, no sky…). The instanced triangle count of the whole set of objects is about 2.7 million. When I check Dr… [Next page](https://forums.unrealengine.com/tag/geometry/1713.md?match_all_tags=true&page=1&tags%5B%5D=geometry)