There is nothing irregular about that wall. The wall's finishing materials are different from the walls next to it. One fast and easy approach would be to use the Split Face and Paint Tools.
Revit 2018 – The Split Face and Paint Tool – Cadline Community
I prefer to use the @barthbradley @ToanDN solutions, but there´s one more good way to do this: using parts! Once you master this technic you will always be tempted to find solutions using it...
I´m a parts fan 😄