In general one has 3 types of walls:

1/ facade walls, which are the tickest, normally have an exterior bricks or wood texture, an interior texture as plaster.

2/ interior sustaining walls and separation walls, which normally have the same texture, but distinguish themselves in tickness.

If the user interface would have these 3(possibly more) of walls as a pull-down button menu, just like the outside borders button of MS-Word (http://www.bettersolutions.com/word/WRZ ... 123331.htm), it will be way faster to draw the appriopriate walls' types.

Same for floor types.