I think you did a fantastic job. The third was a challenge that I think you met. My only advice on the bay window would be to look at a bay and see how the light comes thru all panes. The light in your bay is coming from both sides and it doesn't look bad I just don't know if its realistic. I'm sure you already know you need more contrast in the sides and bottom. As far as which way to put the light, side or bottom its a personal choice. I think in the first two the light is perfect. Again kudos to you for figuring out the bay!