I posted a new version without the planIcon, but kept other SH3D model information (including cutout [font=courier new]M0,0 v1 h0.9 v-0.728 h0.1 v-0.272 z[/font]).

But I am curious, why would you not want the stairs direction indicator in the 2D plan? To me it is better to work with more explanatory icons.

ok

test_staircase_180_uk_style_no_planicon.sh3d