d12 Secret Door Mechanisms

Bonk is a famous grumpy tomato frog

One thing I felt was neglected was details on secret doors.

In my games, I have a spot skill and if you spend 10 min in a square you get a stat roll
Skilled get a full stat to save, unskilled half - then various bonuses for items etc
Possibly some doors I might allow a harder save (stat bonus score only)
Some doors easier to find by touch or sound than sight

d12 Secret Door Styles

1 Camouflaged easily exposed by touch examination

2 Concealed small door or hatch is hidden by some feature or decor like a rug

3 Concealed door built into furniture or architecture

4 Sliding concealed panel

5 Swiveling concealed panel 

6 Bricked up crawlspace or airway from construction

7 Bricked up wall or chamber concealed by craft

8 Built into the wall or floor following construction seems

9 Revolving wall section with swivel mechanism

10 Magical concealed by permanent illusion

11 Door concealed by permanent invisibility

12 Door is a portal usually to a room size pocket dimension

d12 Secret Door Mechanisms

1 Difficult to spot button 

2 Simple trick mechanism

3 Combination mechanism

4 Secret lever separate to door to find and open

5 Door has secret keyholes and lock

6 Trapped switch with separate hidden safety button

7 Complex puzzle mechanism

8 Complex puzzle and trapped trigger

9 Several mechanisms d4+2, only one real rest trapped

10 Magical alarm or magic mouth spell

11 Magical lock or held portal

12 Magical trap wards or runes or sigils