feasible to replace a raytracer with unreal engine?


I’m researching a rendering solution for a client in interior design.

I have looked at ray tracers, but they are too slow. The target rendering time for a 720p image should be < 15 seconds. I’m wondering if unreal is a good choice for this?

How long does it take to generate light map? Can scene generation be scripted or programmed in c++?

Can light map generation be paralleled on multiple computers/gpus?