@ebraahim said:

hi guys when u dont have a su texture to size it, how u guys add bump map to it? i use the bump map as my texture and reduce the color mutiplier to 0.01 becuz its not possible to change diffuse color seperately from its texture
how you do that?

Set a texture in your diffues, as you say you do, then add an white TexAColor map to the transparency slot. That will make that layer invisible when rendering, but still visible in SketchUp.
Then you add a second diffuse layer underneath with just a plain colour - this layer is what you'll see when you render.

(Note that you use a TexAColor map type in the transparancy slow - no just setting the colour.)