Okay so :
@ TTR : yeah that's right, why not using red and orange (instead of blue and light green), I'll do also the shading, I think with 3ds max
@ Jos : "Fuckem" is really not bad, so I'll think of it, all suggestions are welcome :)
@ Toshiba : All the SGs are done before in 3ds max, and I see that PT2 seems to accept them, because the SGs are the same in 3ds as in Carma.
And no, since Xibalba, I used several textures, sure. But as I work with Bemax and 3ds, I avoid to have several textures on one component, only multiple are lights, and glass (and sometimes some extras)