Let's begin with this simple scene. I used a box (editable poly), then used extrude command to create the window. The scene also had some furniture, just to make it not too simple.

The materials were added to the floor, white color wall. For the chairs, I used leather material which you can find it in Vray shaders pack

*note : All materials must be Vray material. It not only make render faster, but also easier to control color bleeding.

Lighting

I used Vray light for diffuse lights. Since the windows in this scene are wide open, I used 2 Vray lights at the windows. Placing them as you can see in these images below.

*note : placing Vraylight inside the room, leave a small space between Vray lights and the wall. Trying not to place them intersect the walls because that will make noises for the render

Test Render

First, you need to assign Vray render for Max. Since this is a test render, it is good to keep the image's size small.

Going to Render tab, then go to Global Switches, right here you can change some render elements such as reflection/refraction, glossy effects,...etc.

Turn off the Default Lights. Then click render, you will get this result.