The color scheme below is the Wolfenstein 3-D palette.
All colors in Wolf3D (ceilings, walls, objects etc.) are found here.
The last color (ff) is used as a transparent background color for object images.
To change the ceiling colors open Wl_draw.c
The lines 949-951 and 953-955 represent the ceiling colors of the six Wolf3D episodes.
The first character (after 0x) represent the line in the palette, the second character represent the column in the palette.
Notice that you have to add the color values twice.
(Lines 957-958 represent the ceiling colors of "Spear", as the compiler directive shows.)
