# Extracting cut / fill daylight lines

**URL:** <https://forum.dynamobim.com/t/extracting-cut-fill-daylight-lines/65915>\
**Category:** Civil 3D\
**Created:** [July 7, 2021, 2:56pm UTC](https://forum.dynamobim.com/t/extracting-cut-fill-daylight-lines/65915 "2021-07-07T14:56:54Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![tgortiz1](https://avatars.discourse-cdn.com/v4/letter/t/9e8a1a/32.png) [@tgortiz1](https://forum.dynamobim.com/u/tgortiz1)\
**Post date:** [July 7, 2021, 2:56pm UTC](https://forum.dynamobim.com/t/extracting-cut-fill-daylight-lines/65915/1 "2021-07-07T14:56:54Z")

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I’ve created a Dynamo script to extract the cut and fill daylight features as 3d ploylines, It sort of works but bring in multi 3d polylines of the same cut /fill feature line can someone tell me what I’m doing wrong?

 ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/7/6/76e030d3db22d302762cf3caf8f1c33924611a95.png)

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**Author:** ![Kulkul](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/kulkul/32/49801_2.png) [@Kulkul](https://forum.dynamobim.com/u/Kulkul)\
**Post date:** [July 7, 2021, 3:01pm UTC](https://forum.dynamobim.com/t/extracting-cut-fill-daylight-lines/65915/2 "2021-07-07T15:01:30Z")

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> [@tgortiz1](#):
>
> but bring in multi 3d polylines of the same cut /fill feature line can someone tell me what I’m doing wrong?

Try to set right click _lacing to longest_.

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**Author:** ![tgortiz1](https://avatars.discourse-cdn.com/v4/letter/t/9e8a1a/32.png) [@tgortiz1](https://forum.dynamobim.com/u/tgortiz1)\
**Post date:** [July 7, 2021, 4:05pm UTC](https://forum.dynamobim.com/t/extracting-cut-fill-daylight-lines/65915/3 "2021-07-07T16:05:31Z")

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I set the lacing to longest on the TkcCorridorFeatureLine.ExportAsPolylines and I still get multi 3dpolylines for each cut/ fill line. I know the problem is at this node. any other ideas?

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**Author:** ![KirkWM](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/kirkwm/32/104406_2.png) [@KirkWM](https://forum.dynamobim.com/u/KirkWM)\
**Post date:** [July 8, 2021, 6:33pm UTC](https://forum.dynamobim.com/t/extracting-cut-fill-daylight-lines/65915/4 "2021-07-08T18:33:10Z")

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Perhaps some list level tinkering? And welcome to the forum 👋🏼