I photograph the products and some select props in simple white studio, then create a 3d space to render the backgrounds, and then blend them together for a final shot.

Here’s progression images showing the photograph (left), 3d rendered interiors (middle) and final composite images (right). For these images I built out the 3d rendered interiors in C4D and match the camera angle + lighting to what was shot in studio. Then I blend them together in photoshop for the final image.