I made a change to the script:

vec_set(temporario,camera.x);
distanciaaoplayer = vec_dist(camera.x,my.x);
trace_mode = ignore_passable + ignore_me;
while (trace(temporario,distanciaaoplayer) !=0) {you.alpha=on;}


but it says now that "you.alpha=on;" has an empty pointer!
and the models dont get changed by alpha :S

http://www.coniserver.net/ubbthreads/showflat.php?Cat=0&Number=560847&an=0&page=0#560847 Cmon every one! Help me building this camera script! The first of its kind in 3dgs! Thnkx to everyone who helped me in my questions