function mtl_vegetation_init
{
        vec_set(mtl.emissive_blue,mat_model.emissive_blue);
        vec_set(mtl.ambient_blue,mat_model.ambient_blue);
        vec_set(mtl.diffuse_blue,mat_model.diffuse_blue);
        vec_set(mtl.specular_blue,mat_model.specular_blue);
        mtl.power=mat_model.power;
        mtl.albedo=mat_model.albedo;
        mtl.skill1=pixel_for_vec(vector(128,0,0),0,8888); // the first value in the vector is the threshold
}

material mtl_vegetation
{
        event=mtl_vegetation_init;
        effect=
        "
        texture entSkin1;
        dword mtlSkill1;

        technique vegetation
        {
                pass p0
                {
                        Texture[0]=<entSkin1>;
                        ZWriteEnable=True;
                        AlphaBlendEnable=False;
                        AlphaTestEnable=True;
                        AlphaRef=<mtlSkill1>;
                        AlphaFunc=Greater;
                        CullMode=None; // CCW when sigle sided polys, or None when double sided polys

                        ColorArg1[0]=Texture;
                        ColorOp[0]=Modulate2X;
                        ColorArg2[0]=Diffuse;
                }
        }
        technique fallback{pass p0{}}
        ";
}

action tree
{

    my.material=mtl_vegetation;
          
    vec_set (temp, my.pos);
    temp.z -= 10000;
    trace_mode = ignore_me + ignore_sprites + ignore_models + ignore_you;
    my.z -= trace (my.pos, temp) + 10; // set the correct height (the bottom of the model will sink 10 quants into the soil).


}  

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could that be a problem that i am exporting from 3dsmax8 to 3ds file?

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yeh, but then i will need to realign every face.

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