# Stretched Draping over Block Massing

**URL:** <https://discourse.mcneel.com/t/stretched-draping-over-block-massing/219710>\
**Category:** Kangaroo\
**Tags:** windows, grasshopperrhino, rhino8\
**Created:** [June 7, 2026, 5:35pm UTC](https://discourse.mcneel.com/t/stretched-draping-over-block-massing/219710 "2026-06-07T17:35:30Z")\
**Posts on this page:** 10\
**Page:** 1

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**Author:** ![nen\_35](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/nen_35/32/743650_2.png) [@nen\_35](https://discourse.mcneel.com/u/nen_35)\
**Post date:** [June 7, 2026, 5:35pm UTC](https://discourse.mcneel.com/t/stretched-draping-over-block-massing/219710/1 "2026-06-07T17:35:30Z")

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Hi all, I am trying to model this facade for a skyscraper. I have this script that drapes fabric over my volume but it isn’t tight enough to give me the effect of these reference photos. I tried using SubDs but it just messed with the rest of the building and didn’t give me a clean result. Any help would be greatly appreciated!

[Skyscraper Base Massing.3dm](https://discourse.mcneel.com/uploads/short-url/7SzdF0rc0xtXHYWj59Qihbc4Cf5.3dm) (130.5 KB)

[Draped Fabric.gh](https://discourse.mcneel.com/uploads/short-url/iPIUYosUwmim8VrpdUWxuQGqwVo.gh) (12.2 KB)

 ![dezeen_Kukje-Gallery-by-SO-IL_4](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/8/7/c/87cabfa09781eaef303dec938d9ba1301f867313.jpeg)

 ![dezeen_Kukje-Gallery-by-SO-IL_1](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/c/a/9/ca913e678a89ef3857d2c39d818b1e5958791c70.jpeg)

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**Author:** ![martinsiegrist](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/martinsiegrist/32/498369_2.png) [@martinsiegrist](https://discourse.mcneel.com/u/martinsiegrist)\
**Post date:** [June 7, 2026, 5:40pm UTC](https://discourse.mcneel.com/t/stretched-draping-over-block-massing/219710/2 "2026-06-07T17:40:01Z")

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Here’s an example:

> [@Shrink Wrap with Kangaroo](https://discourse.mcneel.com/t/shrink-wrap-with-kangaroo/79995/47):
>
> There are a few challenges… The first one is remeshing your object with TriRemesh so it has colinear edges like your polysurface. This failed at the real size of your building and I needed to scale it down to get it to work. The vertices on the outermost convex edges can be set as anchors. In theory a net would also slide over those edges… The top and bottom side of the mesh can be ignored to save some time. We’d be done, if it wasn’t for the collisions. In order to have a somewhat useful res…

The topic even contains screenshots of the same building…

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**Author:** ![nen\_35](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/nen_35/32/743650_2.png) [@nen\_35](https://discourse.mcneel.com/u/nen_35)\
**Post date:** [June 7, 2026, 6:17pm UTC](https://discourse.mcneel.com/t/stretched-draping-over-block-massing/219710/3 "2026-06-07T18:17:46Z")

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Thank you this is exactly what I am looking for! I have a few questions about the script - is the the triremesh component is disabled for a reason? I have my geometry set to the input but it is getting stuck there.

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/7/2/7/7277dbc2afca4a41b654176cb03088b768695dbe.png)

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**Author:** ![martinsiegrist](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/martinsiegrist/32/498369_2.png) [@martinsiegrist](https://discourse.mcneel.com/u/martinsiegrist)\
**Post date:** [June 7, 2026, 6:53pm UTC](https://discourse.mcneel.com/t/stretched-draping-over-block-massing/219710/4 "2026-06-07T18:53:53Z")

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Which file is that?

I sometimes disable a component so it doesn’t recompute when the file is loaded.

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**Author:** ![nen\_35](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/nen_35/32/743650_2.png) [@nen\_35](https://discourse.mcneel.com/u/nen_35)\
**Post date:** [June 7, 2026, 7:25pm UTC](https://discourse.mcneel.com/t/stretched-draping-over-block-massing/219710/5 "2026-06-07T19:25:46Z")

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[shrinkwrap\_building.gh](https://discourse.mcneel.com/uploads/short-url/sSsIf0x2Yv4BvUTSQTvgzIRiEhu.gh) (8.7 MB) I tried enabling all of the disabled components but now the file is frozen. Is there a certain order that things need to be turned off/on?

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**Author:** ![martinsiegrist](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/martinsiegrist/32/498369_2.png) [@martinsiegrist](https://discourse.mcneel.com/u/martinsiegrist)\
**Post date:** [June 7, 2026, 7:47pm UTC](https://discourse.mcneel.com/t/stretched-draping-over-block-massing/219710/6 "2026-06-07T19:47:14Z")

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I don’t see anything disabled in that file.

One thing which might cause trouble is the timer and the SolidPointCollide goal

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**Author:** ![nen\_35](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/nen_35/32/743650_2.png) [@nen\_35](https://discourse.mcneel.com/u/nen_35)\
**Post date:** [June 9, 2026, 1:45am UTC](https://discourse.mcneel.com/t/stretched-draping-over-block-massing/219710/7 "2026-06-09T01:45:45Z")

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Hi again, I was able to get the script running without errors but the mesh does not appear to be stretching over my shape and it not changing despite different inputs. Does it appear to be working on your end?

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<div class="post-metadata">

**Author:** ![martinsiegrist](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/martinsiegrist/32/498369_2.png) [@martinsiegrist](https://discourse.mcneel.com/u/martinsiegrist)\
**Post date:** [June 9, 2026, 4:43am UTC](https://discourse.mcneel.com/t/stretched-draping-over-block-massing/219710/8 "2026-06-09T04:43:00Z")

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Please share the latest state of your files.

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<div class="post-metadata">

**Author:** ![nen\_35](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/nen_35/32/743650_2.png) [@nen\_35](https://discourse.mcneel.com/u/nen_35)\
**Post date:** [June 9, 2026, 5:49am UTC](https://discourse.mcneel.com/t/stretched-draping-over-block-massing/219710/9 "2026-06-09T05:49:15Z")

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[Skyscraper Base Massing.3dm](https://discourse.mcneel.com/uploads/short-url/cZPmrr5gbNyzBraBENmo9EjZLFW.3dm) (424.3 KB) Apologies, here are my current files.

[shrinkwrap\_building \_nn.gh](https://discourse.mcneel.com/uploads/short-url/dAHRyzYaATUsYCcwRR5J2g8bLfh.gh) (7.2 MB)

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/0/b/5/0b57a91f6a12d7d9680770f859328de1f018915e.jpeg)

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<div class="post-metadata">

**Author:** ![martinsiegrist](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/martinsiegrist/32/498369_2.png) [@martinsiegrist](https://discourse.mcneel.com/u/martinsiegrist)\
**Post date:** [June 9, 2026, 7:51am UTC](https://discourse.mcneel.com/t/stretched-draping-over-block-massing/219710/10 "2026-06-09T07:51:32Z")

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Part of the problem is the size and units of your object which does not correspond to my example.

The mesh needs to be triangulated with an edge length of less than 1 unit, I now just tried with 0.5

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/8/0/f/80fab69cc317874e2fedb5596c486c8cc6a62fff.jpeg)

Make sure the Global Trigger Lock is off in the beginning of the simulation. You can enable it later to scale the solid back to full size which pushes the edges out. You can also ignore it for now.

I disabled the triremesh after the solver. It is also not needed during the simulation. You can enable it once the solver is deactivated otherwise the whole thing runs slowly…

[shrinkwrap\_building \_nn.gh](https://discourse.mcneel.com/uploads/short-url/e5ftzSsvX0hBFRXMrweyH1TW536.gh) (4.7 MB)