To change the material of the floor base in Infurnia, you can adjust the Base Material setting. Here's how:
Go to the Floor Level in 2D view in Infurnia.
Click on the "Floor" icon in the Global Preferences and Settings bar, located in the bottom left corner of your workspace.
In the Floor settings panel, find the "Floor Base" section.
Within the "Floor Base" section, you can change the material of the floor base. You can either use the "User-defined" drop-down menu to select a material, or you can choose a material from the "Fetch From Store" option.
After selecting the desired material, it will be applied to the floor base.
This allows you to customize the floor base material to fit the design or project requirements in Infurnia.