Irender Nxt For Sketchup 2017 ((install)) -

It supports a wide array of lighting options, including natural sun and sky, artificial point lights, spotlights, and HDRi backgrounds for realistic environment lighting.

SketchUp 2017 was built before modern ray-tracing GPUs became standard. To get the most out of iRender NXT, follow these optimization tips: irender nxt for sketchup 2017