Forest Pro - https://www.itoosoft.com/
Everyone likes to use lumion because of its capability to render image in a very short time. But you have to invest money to buY good machine for the software. Vray next 3.1 is now faster & smarter and you can use your old machine & old 3Ds max software.
See this video series for a complete simplified tutorial of Vray next 3.1 rendering.
Equipment Used:
i7 2600 @ 3.40GHz
Nvidia Geforce GTX 650 2GB
16GB Ram
2 TB HD