For architecture maybe also free Sketchup and this one
more easy than Kerkythea : http://twilightrender.com/index.php/what-is-twilight/hobby-vs-pro
or this funny free one https://www.getvisualizer.com/ (only for Sketchup)

and this last free very cool one (only for Sketchup) just a little watermark in the right corner up page
Lumen RT VIZ for Sketchup http://www.lumenrt.com/store/ who is also ocean water wind terrain vegetation modeler !

For Sketchup LightUp is also cool but 294€ / 335$ https://www.light-up.co.uk