Site has a collection of Ponds. Some are above grade others lie below grade. Ponds are Components using Auto-Glue & Cut origins. This forces me to place a Ground-Plane at grade.
For the life in me, I cannot get the Style Ground Color to match that on the Ground Plane geometry I added. Have looked into shadows, styles, material color match. Can’t find a logical explanation.
Faces are affected by the “sun” while the background color is not.
Instead of trying to get the ground color to match the faces on which you put the pool, you could make the face larger and leave the ground turned off.
Or instead of setting the Ground color, leave Ground turned off and set the Background color.
I guess if you can’t get a perfect match like I do, you can put that down to graphics card differences.
Extending your grade plane will probably do what you need. Might be that you really don’t need to show the ground running off to the horizon anyway. Maybe there’s other ways you could deal with it.