In OpenSolar you can use Manual 3D Design when there are not 3D data available.
By leveraging on Manual 3D you can still get the same accuracy and precision as the automatic 3D and Shade Analysis.
This video will help you build Complex Multi-Layer Houses when the address you are using does not have any 3D Data available.
This video will show you how to build advanced designs inserting Windows in your Manual Designs.
Watch this video below to learn more: