Provide Radiance scene (.rad files) as reference
Import Radiance files into Blender and optimize it before saving .blend files
Export to various file formats using the multi-exporter add-on.
Render a reference image with Maxwell (.mxs files), probably separating several light sources to see their individual impact on the final image.
Check in the resulting images (into a img sub-folder) and comment on the renderer version and the render time.
Posts about individual scenes will follow soon ...