Tahiti ground markings... dark ?

[vbazillio]

Almost* "Solved" by resetting the PREPAR3D.CFG (backup, delete, launch P3D and it creates a new fresh one) : viewtopic.php?f=3&t=15&start=10

But I have now to reset my configuration (at least everything which is set through the PREPAR3D.CFG) step by step to isolate what parameter(s) was/were guilty.