Settings your after can be modded by copying and editing StarboxDefs.xml.
Thx for this information.
However with my computer skills if I tried to modify a file I would most likely crash the WWW before I figured out the solution I seek.
I was hoping that there were settings in the options menu that I could use.
I purchased GC III as a founder but only recently retried the game as the frequent changes made it difficult to keep up with.
When I did I found I liked all the changes from GC II except the two graphic changes mention in my OP. The brightness and similarity in looks of the background and sensor zone would make great back drops for a battle animation IMHO are a poor choice for a game main screen.
Again THX for the info.
Edit: Found how to edit this on the second oldest page in the modding forum.
Had not gone there as I was looking for an answer in the graphics options you did get me to look
Will try this and see if it does the trick.
Edit2: Worked for the background but sensor radius still blends in with the background.