First, look at the image for information you can use. Look for items which will help you gain knowledge of scale. The couch against the wall is probably around 8 feet long. I will use this informtion to start to draw in 1/4 scale on gird paper. Then I measure the rest of the room in relation to the couch, keeping in mind that as objects get closer to the viewer they will grow larger.
Once I have the basic shape of the room I look for the "vanishing point" by following the horizontal lines in the room that recede toward the center. Once I have located the vanishing point I can make more accurate drawings of the furniture, walls and fixtures. Keep looking at the spacial relationships and adjusting the pencil drawing until it looks right. If you wish, use lines to block out shaded areas.
Transfer the drawing to marker paper manually or through a xerox copier.
Consult your original photo/image to determine your color scheme.
Be prepared to make some mistakes coloring. Have an extra copy of your line drawing ready for your second draft.
Personally, the lines on the blue wall don't work for me. In a second draft I would use only marker on the walls
or use lines more in an all-over way. They look out of place.
