yes me I see two gray tone of the floor at mid height is white for the ceiling and the rest of the height is possibly the darker floor but with part in "Grating" is of course .. all well patina by wear. . this gives an operational aspect ..
example but this style but dirtier tightened very well

have been able to look at your problem?
I am not modders but and there is no time for that ... The DDS file format (short for DirectDraw Surface) contains raster images
Format uses S3 Texture Compression algorithm Standard DDS file contains textures, backgrounds, wallpapers, patterns and texture maps for games
as I told you ex = "tile_metal_04" I do not know which one controls the ceiling but it must be possible to open with Gimp or other in order to change the RGB suddenly change the color ... if I am not abusing it. But I had to look but it is possible I am on Xenomerv is the other one we do. For lighting see the "Hd cfg" & "light cfg" to refine vickers could perhaps help you now with the editor I do not know how it reacts