Sunset

Excellent effect with the settings sun. The volume clouds look good, the Bryce 2D clouds behind look a little surreal. The water looks good to me too. Nice reflection. If you want to reduce render time and this is an Standard Render. You could consider raising the AA threshold from default 15 to 55. Or lowering the Max Ray depth to 4 or even 3. If you have an issue with the reflection sometimes you can get better results with reflection correction being ticked - but not often. Whatever, excellent render!