The most professional decoration design software is CAD and 3dmax commonly used by designers. If you are not a professional, there are some simple decoration design software, such as cool music and beautiful family. These decoration design software, I personally recommend Kujiale, which is very suitable for non-professionals. Simple and easy to use, many materials, rendering renderings very fast. It is the fastest of all decoration design software. How fast? You just have to try.

This is the renderings I rendered with Cool Le Jia Decoration Design Software. You can have a look.