Creating the game board (Ground)
Start with a Node3D as the root rename it to BaseLevel
Add a CSGBox3D as a child
In game development, Constructive Solid Geometry (CSG) is a technique for generating 3D models by combining simpler shapes using Boolean operations like union, intersection, and difference. It is most often used to prototype a level design.
To create a huge floor area
adjust the size property of the CSGBox and the transform y position as shown.
Add a new standard material to the CSGBox
Set the color to something darker
Add a camera and lighting to the scene
Click on the three dots to the left of Transform
Now click on add Sun to Scene and Add Environment to Scene
Your Scene Tree will now look like this:
Adjust the camera settings as shown
to look down at and angle to the floor
Save your scene and run it - not a lot to see as the camera is staring at the floor...