Keet and Dorin are absolutely right. I use the Sweet Home 3D version (Optical Shop 3D) in my daily professional work. With the development of the program for the purposes of my company, with this program I am able to do all the tasks without the need for another program with great precision. It is not difficult to make a very precise plan of a space and all this with only numerical inputs, you just need to engage your brain a little and understand how it is very simple.