As in, some render that can do Global Illumination, area lights and area shadows, and the like.  Not necessarily software that costs thousands of dollars, but not Poser's rendere either.  Area lights and shadows can be faked to an extent, but GI is very difficult to really fake, especially for a scene with a lot of ambient light as shown above.  Learn about lighting, learn what your renderer can do, observe the real world, etc.  There are no 1-2-3 quick easy steps that will let you duplicate promo art like that shown above.

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