This is happening with just one roof of 4 in the project. It happens to be the one with the most complicated shape. If I copy and paste it from the R7 project into the R8, it appears momentarily and then disappears. I’ll upload the R7 project to Asuni’s attention. I’ll send a link to it – on dropbox…

Disappearing Roof when R7 project opened in Rhino8

fsalla (Francesc Salla) September 5, 2025, 10:45am 4

Can you try it with the VisualARQ 3.6 RC1 version? you can download it here: VisualARQ 3 - Version 3.6 RC1 released

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