04-17-2010, 07:57 AM
You've got some perspective issues with the extra building you've added. The floor looks like it's sloping down towards the pond - it should share the same vanishing point as the rest of the villa, given it is perpendicular to it. The reflection in the pond would also show us some of the ceiling - you can't get away with a 'flip' like you could with a tree.
Personally, this seems something that 3D was built for - Sketchup should be more than sufficient for a nice simple bit or architecture like this.
I might have time to do a paintover if this doesn't make sense - let me know.