I had posted in another thread that I achieved my best luck in seeing the buildings using JohnCougar1 color scheme.
So I set out to try to figure why I that was. Most all the schemes had the samesettings in 3d section of the color.ini or color3d.ini files, but JohnCougar1 had this section not listed in the others:
;==============================================================
;HP specific clip planning
;--------------------------------------------------------------
[clip_planes]
; mode, lower bound, upper bound, lower value, upper Value
; mode: 0: by zoom level, 1: by number of cells, 2: by intersect value (0..45)
; values: 0.0 .. 1.0 * 1000 (= 0..1000)
faded_buildings_near = 0, 10, 200, 600, 600
faded_buildings_medium = 0, 10, 200, 650, 650
faded_buildings_far = 0, 10, 200, 750, 750
solid_buildings_near = 0, 95, 100, 1000,980
solid_buildings_medium = 0, 95, 100, 1000,980
solid_buildings_far = 0, 95, 100, 1000,980
landmark = 0 , 1, 50, 1000, 1000
road0 = 2, 0, 45, 1000, 1000
road1 = 2, 0, 45, 1000, 990
road2 = 2, 0, 45, 1000, 980
road3 = 2, 0, 45, 1000, 970
roadsign = 2, 0, 45, 1000, 950
;a ket reszletesebb terrain
terrain0 = 0, 30, 30, 750, 750
terrain1 = 0, 30, 30, 850, 850
;reszletes shapek. Mivel lassu, ezert ne vigyetek tulzasba.
shape0 = 2, 1, 10, 1000, 0
I've added this to the color.ini file or the color3d.ini file just under the other 3d settings in four other schemes.
Threw it in the nav and they all worked. If you're willing to take the time just add the above into your scheme files.
Let me know how it works for you.
P.S. Not all the schemes have a color3d.ini. If there is, be sure to add it to that file otherwise add it to color.ini.
The non modified color shemes are listed in this thread by Boris