I designed a modern house with 3d elevation in SketchUp 2017 with all realistic proportions and floor plans and rendered it in V-ray for realistic preview.
This SketchUp model is about a 2 storied residential house with an open garage, large covered portico, balcony with railings.
I think you would love to watch my youtube video about this model. here you can see how the model was designed via section cut and how does it look like while roaming around the house.
I made this 3D model for all of you, those who need it for educational purposes. Please give credit to me if you use this model for your project or commercially.