SOFTWARE FOR ARCHITECTS, DESIGNERS AND ENGINEERS?

[chetanboy18]

Hi Friends,

I am new to the 3D rendering field, I would like your help in:
I am just searching for some integrated 3D rendering software which would be beneficial for architects, interior designers, mechanical engineers, designers.

From your experience, which renderer will be beneficial for the following categories:
Architects:
Interior Designers:
Mechanical Engineers:

Or is there any integrated 3d rendering product that can be used for all the above professional needs?
Can you also give the reasons for your choices please? And any information on their pricing structure would be really grateful.

Any help would be much appreciated.