Surfaces of room

== Increase room size ==
You can edit room size by entering the room expansion view from the top left corner.
This opens a new menu. Under the "Tools" section, you can find add and remove buttons, which you can use to expand or shrink the size of your room. With these tools, you can create separated rooms by removing squares between existing rooms, or you can add walls from the items menu.
== Walls, floors and ceilings ==
You can choose a theme for your rooms (rooms). You can combine themes (space-themed walls with Egypt-themed floors) however you want. Unfortunately surfaces aren't customizable in room expansion view, but there is workaround for this:
# Place an "Empty Wall" wall.
# Exit room expansion view (click back arrow in top left, or press esc).
# Under "Groups" go to "Walls" submenu, then choose and place your desired wall.
# Click on your wall to select it.
# On the properties panel on the right side of the screen, find the "Textures" section.
# There, you can either paint over your wall or import your own texture.
This can also be done to floors and ceilings.
IMPORTANT
When you place a wall, make sure to check the box "Is Obstacle", so players can't walk through your walls!
You can make more rooms with the same steps, or divide a larger room into smaller rooms.