Ah ok, the:

// move_mode = ignore_passable | glide; //replace c_move with these 2 lines in versions of gamestudio below 6.4
// ent_move(nullvector,my.move_x);

is commented out



and I havea new action like NEM's said to add:

action Poly_on
{
my.polygon = on;
my.shadow = on;
}

That is without the Polygon button checked in the engine, but still doesn't work, with the new action assigned to the Model