AMD OpenGL GPU Renderer

I have an older PC with a relatively fast GPU (AMD RX 470) and would like to use GPU instead of CPU to render scenes for personal use (mainly my house interior and exterior). I’ve spent too many hours investigating and testing renderers. It seems most either support only CPU rendering or are nVidia CUDA based. I’ve looked at Visualizer, LightUp, Thea and Twilight. Are there any OpenGL GPU renderers that are a good alternative to the expensive vRay? Please share your experience.

I find Lumion a good solution for GPU based renderings.

Though, it probably is more expensive than any of rendering engines you are considering.
I am not sure if it is OpenGL, i have read somewhere that it uses DirectX instead. (Although I am not sure if that is technically correct)