yeah ^^ that´s a cool idea! gonna try it.

[edit] here is it, have fun

Code:

---

	texture entSkin1;
	texture entSkin2;

        technique vegetation
        {
                pass p0
                {
                        Texture[0]=<entSkin1>;
                        ZWriteEnable=True;
                        CullMode=CCW; //

                        ColorArg1[0]=Texture;
                        ColorOp[0]=Modulate2X;
                        ColorArg2[0]=Diffuse;
                }
                
                pass p1{
                	Texture[1]=<entSkin2>;
                        ZWriteEnable=True;
                        CullMode=CW;

                        ColorArg1[1]=Texture;
                        ColorOp[1]=Modulate2X;
                        ColorArg2[1]=Diffuse;
					 }
        }

---