when i import the model in lumion and start rendering the color suddenly all the other texture turn into black color
Are the faces oriented correctly in the model?
i also tried to revese all the face then also in sketch up then color it but did not work.
That image doesn’t show the face orientation. How about showing a screen shot from SketchUp with the face style set to Monochrome?
Try renaming the materials within SketchUp. Just call them something like ColorA and ColorB.
And Check your Lumion materials settings to make sure they are not including any technical properties, like transparency or illumination.
Lumion searches for materials names and swaps them with what it thinks they are supposed to be (eg anything named Glass in SketchUp will become Glass in Lumion).