Floor tile duplication.

[Erik]

You can stack multiple floortiles that contain different materials.

• Grab floortile, e.g. Molitz floortile.
  
• Find other floortile e.g. Steel floortile.
  
• Click steel floortile using Molitz floortile.
  
• The Molitz floortile stack how has one extra floortile, congrats you can now duplicate floortiles.