Polycurve with offset around the slab

[staylor]

It looks like the script that @sovitek has is doing a true gap between the ceiling and the wall and not a recessed notch like you previously were looking in the post below.

Shaft, lining detail, expansion joint

I’m trying to create a routine to detail the plaster lining, such as moldings and especially the expansion joint, I’ve tried using extrusion, void form, and shaft, but without success. Does anyone know a way to create a routine like this? That identifies the ceiling, and makes an indentation (as in the image), a lowered indentation in the surroundings automatically. Thanks in advance for all your help. [download (3)(1)] [gessojunta] [gesso]