For shading walls and parts of the elements I’m using these brush settings.



More black on the left. Because when you are sketching in black & white and picking color only from the image, you will possibly loose the black color, true black.







Some texture on the walls too.







Remember that the further the environment foes the more contrast it loses in the vanishing point. So our further part of the image must be a little bit lighter (B&W).

I will draw some additional details. This time it’s going to be a curtain.



In fact there will be several curtains that go in the vanishing pint to. Each I will do on the separate layer.



Erase back to form the edges. That why we need these curtains on separate layers.



Draw surface lights. Surface lights are little lights that Stay on the Borders or edges of the object.



Than we will work with the lights and little dots like dust or something.

For the lights I’m using one of the Ryan’s Churche techniques. Create a layer draw lights directionally with soft low flow brush and then erase the borders of the lights.