Grimrock

I am not looking for a spoil per se I am asking if all buttons and switches are similar throughout the dungeon. As in for the grey walls the button is where it is always and for the mossy bricks in the upper area.. etc. etc. this is excluding the secret wall buttons.

All in all I count the hidden button, the secret kind of I shaped button and the sun buttons and then there are levers. Is this it? Are they always on the flat wall or can they be like the area below the boss encounter where the grate can be shut by pushing buttons in a different view?
Just looking to calibrate myself for looking around.

thanks

There are multiple types of hidden buttons as you progress through the game, so don't get too comfortable.