SplitBuildingMass not able to split a simple box into zones for more than 1 floor

[Grasshope]

Hi, @ElzineBraasch, glad that you solved the issue.

FYI, some previous discussions on similar issue, and the team also recommended to use the new sliptFloor and splitZone components for convex building massing:

Strange results from splitBuildingMass component for a simple rectangular zone

(This is my first post in the new forum. Thank you very much, the LB+HB team!) I got the following strange result for a simple rectangular zone when using the splitBuildingMass component to create perimeter zones: [Image 55] Appreciate if guys here can advise what’s the source of issue here. May I also ask if there are general suggestions for using the splitMass component which is unpredictable sometimes… Thank you. perimeter_zone_error_v002.gh (476.7 KB)