In this step, we modify the Hardwood material with a lower emissivity to better simulate grass, which is slightly more reflective than hardwood.
To open the Material quick edit dialog, click Edit from the Materials context menu:
On the Material quick edit dialog, Type = Solid.
Name = Hardwood
On the Material line, Click Edit...
Change the Name to grass
Select My Materials from the Save to database menu.
Click the X-Direction button.
Value = 10
Click Apply.
Click the Emissivity button.
Value = 0.3
Click Apply.
Click Save.
Click OK.