# Tessellation + Opening

**URL:** <https://forums.buildingsmart.org/t/tessellation-opening/1833>\
**Category:** Developers\
**Tags:** ifc4\
**Created:** [September 19, 2019, 12:19pm UTC](https://forums.buildingsmart.org/t/tessellation-opening/1833 "2019-09-19T12:19:09Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![ReD\_CoDE](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.buildingsmart.org/red_code/32/226_2.png) [@ReD\_CoDE](https://forums.buildingsmart.org/u/ReD_CoDE)\
**Post date:** [January 22, 2020, 5:51pm UTC](https://forums.buildingsmart.org/t/tessellation-opening/1833/4 "2020-01-22T17:51:27Z")

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Hi,

In geometry/topology related areas I have few knowledge and experience, especially on IFC

But it seems that I can guess what are you talking about:

Have you faced this: You have a wall with **a lot of layers** and want have a void/boolean (with a customized shape) that effects on “ALL” layers?

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