Hello, Myself Pragya,
I am working as a professional architect and 3D modeller for last 5 years.
I have expertise in Autocad, Solidworks, Google Sketchup, Lumion, V-ray, 3DS Max.
I provide all services like 3D modeling with accurate geometry and curved,complex shapes and its realistic rendering.
I have seen the files and I can help you edit the 3D file and also give you very realistic rendered views with appropriate lights.
I will give you the render option for 3 lights not by Photoshop but with rendering the model with those light colors, that will be more realistic than photoshop.
Kindly provide me an opportunity to work for you.
Warm Regards,
Pragya