Simple tool for extruding stair.
Update
-. No need to pick subobject polygon as firststep anymore.
Now its done via sorting polys which atleast has 2 verts which are not shared with another poly
-. Fix random missing riser. Thanks to ali shafiee for reporting the bug. Weld all vertices before extruding, also related to object pos from origin)
-. fix nagging messagebox for original object deletion
-. Set 2 materialID for tread and riser
-. set subobjectlevel = 0 if subobject is still on when user create stair
otherwise it causes weird viewport artifact
info:
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