As I explained in the description of the Alchemist Goat, it is possible for anyone to add and remove materials to his own list. For that you need to open the game console and enter some precise commands, and I will explain here how you can do that ;)

First of all you can open and close the console using the [\] or [~] key. There is a command helper listing all the available commands when you start typing in the console: don't use commands that are not listed here unless you know what you are doing, those commands can break your game.

• AlchemistGoatHelp: Display the list of commands (in case you forgot them).
  
• WorldMaterialsList: Display all the materials available for your game.
  
• LearnTransmutationMaterial materialName materialSource: Add the material "materialSource" to your list and name it "materialName".
  
• ForgetTransmutationMaterial materialName: Remove the material named "materialName" from your list.
  
• ResetTransmutationMaterials: Reset your material list to the default one.

1) Find a material
What you need to do first is to use the following command to get the list of materials available on your computer (this may change a little depending on the mods you installed):
Then use the mouse wheel to go through the list and find a material you would like to add to your list.
This list can be interpreted as 4 columns : material_number / material_type / material_property / material_name. Let's say you want the material number 213 (the dollar), you will see the following line in the list:

• material_number="213)"
  
• material_type="Material"
  
• material_property="Goat_Props_02.Materials.Dollar_Mat_01.Name"
  
• material_name="Dollar_Mat_01"

Only the material_type and material_property are important, you can forget the rest.

2) Add a material
If we continue with the sample up there, if you want to add the dollar material to your list and name it "Dollar", you should enter the following command:
The second parameter of this command (materialSource) is obtained with: material_type'material_property' WITHOUT the ".Name" at the end of the material_property.

3) Remove a material
There is a material called "Dirt" in the list and you don't like it? To remove it enter this command:

4) Reset the material list
Finally, if you messed up your materials list and want to come back to the original list, you can enter the following command: