You can read more about the Dynamic Texture class here.
Material: This is the link to the Unity material that we will use for this Dynamic Texture.
Texture is Tiled: Flag if this texture is tiled. If the texture is tiled, then it will repeat across the geometry in Unity space defined by the Texture Unit Size below. Wall geometry with brick textures is likely tiled.
If the flag is false then the texture is not tiled and will be rendered once. This is likely used for doors and windows. You can choose to repeat the texture along the horizontal or vertical with the two repeat values below.
Repeat X: For untiled textures, how many times should the texture repeat along the horizontal.
Repeat Y: For untiled textures, how many times should the texture repeat along the vertical.
Texture Unit Size: At what scale should the tiled texture generate at. This value represents the Unity unit size of the texture. So if your brick wall texture is of a wall 4 metres wide and 3 meters high, then you would set the X to 4 and Y to 3.