[Bug] Walls dissappear when floor material is changed nearby

[MadJax]

Found this when designated areas to change the floor pattern (Wooden, ceramic tiles etc) and it intersects a wall, the job completes fine but seems to make the wall itself invisible



The above example, there are actually walls in front of medical wing/office/morgue and the solitary units, yet they've been rendered invisible

EDIT: It seems to have replaced the walls entirely, not just made them invisible

[a__gun]

Yes at the moment walls and flooring are both just considered 'materials' by the game. This means building one on a square will remove the other.