[cbk1994]

It's possible but would almost certainly require a custom movement system. You could do it with setshape2 and NPCs but I wouldn't recommend it.

edit to expand:
Using custom movement, the best way I can think of to do it is to make a list of tiles of each type and use a custom tile type function.

PHP Code:

//#CLIENTSIDE
enum TILE {
  FLOOR,
  WALL,
  CHAIR,
  BED
}

function getTileType(dx, dy) {
  temp.tile = player.level.tiles[dx, dy];
  
  switch (tile) {
    case 100:
    case 101:
    case 102:
    case 103: // etc
      return TYPE.CHAIR
    break; // not really needed because of the return but I think it improves readability
    
    case 200:
    case 201:
      return TYPE.BED;
    break;
    
    case 300:
    case 301:
    case 400:
    case 401:
      return TYPE.WALL;
    break;
    
    // any which haven't been defined above
    default:
      return TYPE.FLOOR;
    break;
  }
} 


You could alternatively use if-statements or arrays instead of a switch. Dusty also did something with color mapping.