Top new features in Lumion 8: 

Capture your architectural vision in the best possible light 
The Styles Button is the power of Lumion 8 brought together. Just press it, select a style. In an instant you get a stunning image with a backbone of balanced light, depth and realism. 
Visualize creativity like never before with the new Sky Light daylight simulator and the soft and fine shadow enhancements. Turn them on and watch as the foliage and grass become dramatically photorealistic. See the shadows beneath tables and shelves become subtle and soft. Notice as people, plants and buildings suddenly look like they belong where they are. 

Sky Light 
Ready to render? If you haven’t added the Sky Light effect, then…well…no. Maybe not. Because it’s the one technology developed especially for Lumion 8 to heighten your image’s sense of environment, realism and depth. 

Whats New : 
 
https://lumion.com/what-s-new.html 

System Requirements 

Recommended System Requirements 

Graphics card: Minimum 8,000 PassMark points, 6GB memory or more and compatible with DirectX 11 or later. Click here to see how to select a graphics card for Lumion. 
OS: 64-bit Windows 10 
CPU: As high a GHz value as possible, ideally 4.0+ GHz. A lower GHz value may act as a bottleneck for fast graphics cards such as the Nvidia GTX 1080 and Nvidia Titan X (Pascal). More CPU cores than 4 will not make a difference. CPUs such as the i7-4790K, the i7-6700K or the i7-7700K with 4.0+ GHz are good choices. Xeon CPUs with GHz values lower than 3.4 GHz are not recommended. 
System memory: 16GB or more with as high a MHz value as possible. 
Monitor resolution: 1920x1080 pixels or higher. 
Hard drive: 20GB of disk space 
Power supply: Click here to see which power supply you need