Paths for a top shine?

i want create top shine rectangle in image. use pen tool start shape drawing left side of path, plan copy path, paste it, flip it, , join 2 parts together, fill white , lower opacity.

 

1. why path drawn pen bit pixelated?

2. after selecting both original path, , newly pasted one, select them both , join them via modify >combine paths>join, though not stay connected when click on individual sides?

3. there easier way create top shine type shape this?

 

thanks!

1. looks pretty me. (be sure view @ 100% zoom.) said, steep , shallow angles tend more "stairstepped" 45-degree ones. might weakness in fireworks' rendering/anti-aliasing algorithms.
2. not sure why 2 sides not stay connected if they've been joined composite path.
3. you draw ellipse (or rounded rectangle) , rectangle of same width, or wider. position rectangle against top half of ellipse, , use subtract/punch, within combine paths options in properties inspector, create compound shape.
   another strategy make copy of original rectangle , use mask shape (e.g., ellipse) being used top shine. place copied rectangle above ellipse, select them both , choose group mask.

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