# \#intersect **URL:** https://discourse.mcneel.com/tag/intersect/117.md [Latest](https://discourse.mcneel.com/latest.md) · [Categories](https://discourse.mcneel.com/categories.md) · [Tags](https://discourse.mcneel.com/tags.md) --- ## [Surface intersection not found](https://discourse.mcneel.com/t/surface-intersection-not-found/218358)
**Author:** [@laborda](https://discourse.mcneel.com/u/laborda)\ **Replies:** 3\ **Last updated:** [April 24, 2026, 2:46pm UTC](https://discourse.mcneel.com/t/surface-intersection-not-found/218358 "2026-04-24T14:46:57Z")
Hi All, Today I’m having an issue with a pair of surfaces that intersect, but the \_Intersect command can’t find the curve. Can someone tell me what is happening? I tried with V9 and 8. Intersection Issue\_260424.3dm … --- ## [Mesh Ray Intersection functioning unexpectedly](https://discourse.mcneel.com/t/mesh-ray-intersection-functioning-unexpectedly/206871)
**Author:** [@Coopercho](https://discourse.mcneel.com/u/Coopercho)\ **Replies:** 1\ **Last updated:** [July 8, 2025, 7:16am UTC](https://discourse.mcneel.com/t/mesh-ray-intersection-functioning-unexpectedly/206871 "2025-07-08T07:16:18Z")
MESH RAY INTERSECT QUESTION.gh (12.8 KB) Hi, I am testing for view obstruction to a given surface from a certain point. But it seems that mesh ray intersection is not giving me expected results results. Some of t… --- ## [Multiple curves intersection from offset: remove stray segments](https://discourse.mcneel.com/t/multiple-curves-intersection-from-offset-remove-stray-segments/199056)
**Author:** [@Intuos](https://discourse.mcneel.com/u/Intuos)\ **Replies:** 3\ **Last updated:** [February 5, 2025, 9:57pm UTC](https://discourse.mcneel.com/t/multiple-curves-intersection-from-offset-remove-stray-segments/199056 "2025-02-05T21:57:09Z")
I have been tinkering with offsets and intersections for a while now. I realised I need something faster than combining closed regions and I need clean curves so neither of these work as a solution: Basically, what I … --- ## [Parametric Relationship Interactive Walls, Floors](https://discourse.mcneel.com/t/parametric-relationship-interactive-walls-floors/187907)
**Author:** [@Oluwafisayo\_Adabs](https://discourse.mcneel.com/u/Oluwafisayo_Adabs)\ **Replies:** 0\ **Last updated:** [July 11, 2024, 2:38pm UTC](https://discourse.mcneel.com/t/parametric-relationship-interactive-walls-floors/187907 "2024-07-11T14:38:40Z")
Does anyone know how to create interactive walls in Three.js that automatically adjust when a connected wall is manipulated? I have a room modeled as a GLB file, comprising four walls and a floor. For example, if I stret… --- ## [Intersect, resulting curve](https://discourse.mcneel.com/t/intersect-resulting-curve/177335)
**Author:** [@Jure\_Bebić](https://discourse.mcneel.com/u/Jure_Bebi%C4%87)\ **Replies:** 4\ **Last updated:** [March 6, 2024, 1:12pm UTC](https://discourse.mcneel.com/t/intersect-resulting-curve/177335 "2024-03-06T13:12:47Z")
Is there a way to obtain the same curve as ExtractIsocurve would get you when using the Intersect command and why does Intersect even try to interpolate a curve (tolerance setting?) ? --- ## [Speed up region difference component](https://discourse.mcneel.com/t/speed-up-region-difference-component/149513)
**Author:** [@serabouch](https://discourse.mcneel.com/u/serabouch)\ **Replies:** 2\ **Last updated:** [October 22, 2022, 12:03pm UTC](https://discourse.mcneel.com/t/speed-up-region-difference-component/149513 "2022-10-22T12:03:10Z")
I need to speed up this process, any tips? speed up.gh (38.2 KB) --- ## [Less computationally intensive way of finding multiple curve intersects](https://discourse.mcneel.com/t/less-computationally-intensive-way-of-finding-multiple-curve-intersects/148598)
**Author:** [@dragonknight.soh](https://discourse.mcneel.com/u/dragonknight.soh)\ **Replies:** 0\ **Last updated:** [October 3, 2022, 4:41am UTC](https://discourse.mcneel.com/t/less-computationally-intensive-way-of-finding-multiple-curve-intersects/148598 "2022-10-03T04:41:03Z")
Hello, I am trying to remove all curves that are intersecting with one another in this and so far, the component Collison Many|Many does what I want it to. However it takes an incredible amount of time to process due to … --- ## [Can't connect lines (roof rafters) to circle perimeter (high point)](https://discourse.mcneel.com/t/cant-connect-lines-roof-rafters-to-circle-perimeter-high-point/146908)
**Author:** [@a\_farr](https://discourse.mcneel.com/u/a_farr)\ **Replies:** 3\ **Last updated:** [September 5, 2022, 5:26pm UTC](https://discourse.mcneel.com/t/cant-connect-lines-roof-rafters-to-circle-perimeter-high-point/146908 "2022-09-05T17:26:20Z")
Hi there, It’s been a few hours and I can’t find a reference or search result that can help me get further. At the moment the rafters, or lines are all joining to one central high point as defined by the circle. … --- ## [How to determine closed curve by intersecting with line](https://discourse.mcneel.com/t/how-to-determine-closed-curve-by-intersecting-with-line/77633)
**Author:** [@it18](https://discourse.mcneel.com/u/it18)\ **Replies:** 3\ **Last updated:** [January 21, 2019, 6:52am UTC](https://discourse.mcneel.com/t/how-to-determine-closed-curve-by-intersecting-with-line/77633 "2019-01-21T06:52:20Z")
Hi Guys, I have a quick question. Is there anyway to determine those vertical line belong to which closed curve? Kindly note that, those closed curves are on the same plane and vertical lines ain’t. I have attach her… --- ## [Intersect strange bug](https://discourse.mcneel.com/t/intersect-strange-bug/75078)
**Author:** [@nicovlogg](https://discourse.mcneel.com/u/nicovlogg)\ **Replies:** 4\ **Last updated:** [November 27, 2018, 3:52pm UTC](https://discourse.mcneel.com/t/intersect-strange-bug/75078 "2018-11-27T15:52:15Z")
Hi all A very strange intersection bug is attached here. 2 surfaces that clearly intersect show no intersection, UNTIL they are both moved (by any amount) - then intersection suddenly works. Please see file attached. i… --- ## [Intersect curve curve, preserve data structure](https://discourse.mcneel.com/t/intersect-curve-curve-preserve-data-structure/74091)
**Author:** [@the.vonz.himanen](https://discourse.mcneel.com/u/the.vonz.himanen)\ **Replies:** 2\ **Last updated:** [October 31, 2018, 7:20am UTC](https://discourse.mcneel.com/t/intersect-curve-curve-preserve-data-structure/74091 "2018-10-31T07:20:31Z")
Hello all, I am having some trouble with the following problem. I have two sets of closed curves, set P (in red) and set Z (in purple). I want to create a table that shows the areas of each curve in Z that intersect… --- ## [No intersection found between clearly intersecting surfaces](https://discourse.mcneel.com/t/no-intersection-found-between-clearly-intersecting-surfaces/41200)
**Author:** [@Justin\_Parker](https://discourse.mcneel.com/u/Justin_Parker)\ **Replies:** 5\ **Last updated:** [February 10, 2017, 9:05am UTC](https://discourse.mcneel.com/t/no-intersection-found-between-clearly-intersecting-surfaces/41200 "2017-02-10T09:05:56Z")
Hello, I'm having a problem with trying to trim a surface with another surface. The model is a propeller blade, which has some pretty complex 3D curvature (not sure if that is part of the problem), consisting of four fa… --- ## [Contours from draped surface](https://discourse.mcneel.com/t/contours-from-draped-surface/26679)
**Author:** [@robinp](https://discourse.mcneel.com/u/robinp)\ **Replies:** 3\ **Last updated:** [November 13, 2015, 10:50am UTC](https://discourse.mcneel.com/t/contours-from-draped-surface/26679 "2015-11-13T10:50:22Z")
I have been trying to get contour lines from a site model. The starting point was a mesh which was then converted to nurbs surfaces and finally, I used drape to create a clean single surface topography. Not matter what…